Multilevel analysis of entrepreneurial intention of engineering graduating students in Ethiopia

ABSTRACT Recently, entrepreneurship has been given serious devotion due to its importance on economic growth, job creation, sources of innovation and productivity. So, this paper aims to identify the determinants of entrepreneurial intention of engineering graduating students in Ethiopia. Stratified sampling technique was employed and data were collected via questionnaire from 921 students from the target population. The study utilized regression statistics to analyze the data. The data used for this study is hierarchally structured and hence multilevel binary logistic model was used to identify the relationship between predictor and outcome variables by taking into account both level-1 (students’ characteristics) and level-2 (universities characteristics) in regression relationships. The model result founds that personal attitude, perceived educational and relational support are the significant predictors of entrepreneurial intention of students at 5% level. The policymakers should facilitate entrepreneurship trainings to change attitude of students and strength the cooperation between students and fund raisers.


Introduction
Recently, entrepreneurship has been given serious devotion due to its importance on economic growth, job creation, sources of innovation and productivity (Urbano & Aparicio, 2015). It has captured the attention of both scholars and policy makers during the last decades. The main reason of this concern is the growing need for entrepreneurs who accelerate economic development through generating new ideas and converting them into profitable ventures. Entrepreneurial activities are not only the incubators of technological innovation; they also provide employment opportunity and increase competitiveness. Thus, developing countries like Ethiopia encourages students to be involved in entrepreneurship and consider entrepreneurship as a career choice. Because entrepreneurship is important to economic advancement, employment as well as a solution to the excessive number of university graduates and social problems.
Many studies on college students' intention to become entrepreneur have been conducted. Students may have different attitude and can react differently on the expected entrepreneurial behavior. Perhaps they can exhibit positive or negative attitude toward entrepreneurship depending on their background and other traits. If the students have positive attitudes toward entrepreneurship, it is likely that after graduation they will start their own business. Conversely, if they form negative attitude, likely they will not become self-employed. In general, individuals desiring more income, more independence, and more net perquisites have high tendency to engage in entrepreneurship (Fitzsimmons & Douglass, 2005). Scholars are trying to identify the contributing risk factors of student's entrepreneurial intention for their future career. The willingness in becoming entrepreneurship is determined by some other factors such as family, motivation, risk taking propensity or the courage to take a risk, and self-concept as individual factor (Belas & Kljucnikov, 2016;Herdjiono, Puspa, Maulany, & Aldy, 2017;Tyszka, Cieślik, Domurat, & Macko, 2011). Family environment and all conditions within its family including how parents educate, family member's relation, house condition, family's financial condition, parents understanding, and cultural background will support, guide, and encourage children to their future life. This is consistent with a research done by Lindquist, Sol, and Van Praag (2015), Fatoki (2014) whom states that family environment gives positive influence on the willingness in entrepreneurship. Social factors have also an encouraging or impeding effect on the intention of individuals for entrepreneurial career. Family background, education, previous work experience, risk attitude, over-optimism, preference for independence, and the norms and values of a society influence the choice of individual's life careers, i.e., entrepreneurship or salaried employment (Sanditov & Verspagen, 2011).
Unemployment occurs due to many factors, one of them is because of the limitation of job opportunities. Nowadays, many college graduates prefer to work as employee in a company or becoming government employee. It means that they are a job seeker instead of a job creator. Only few of them think to create self-employment or become entrepreneur due to lack of confidence in their skill and capital (Herdjiono et al., 2017). Other researchers pointed out that an individual with higher tolerance for risk and less aversion to work effort should be expected to be more likely to engage in entrepreneurial behavior (Ayalew & Zeleke, 2018;Bezzina, 2010;Douglas & Shepherd, 2002). Nguyen (2017) also studied entrepreneurial intention among international business students in Vietnam. The result of the study confirms that attitude towards entrepreneurship and perceived behavior control is positively related to entrepreneurial intention.
Different scholars have shown the effect of student-related predictor variables on entrepreneurial intention using different models. But the entrepreneurial intention of student is not only affected by student-related variables but also affected by so many external factors. For instance, perceived structural support, business counseling, perceived educational support, perceived relational support, availability of funds by fund raisers, etc. can affect the entrepreneurial intention of students. So, to know the contributing risk factors of entrepreneurial intention of students, this research work considers both student level-related variables and university-related variables. This implies the data we considered for this research work has a hierarchical structure, i.e., students are clustered within university. Traditional "single level" models used by previous scholars fail when data are hierarchically structured, because the assumption of independence of observations conditional on the explanatory variables is violated. The nested structure causes so called "intraclass dependency" among the observations within units at the higher level of the hierarchy. The multilevel binary logistic regression analysis considers the variations due to hierarchy structure in the data. It allows the simultaneous examination of the effects of group level and individual level variables on outcomes while accounting for the non-independence of observations within groups. Also, this analysis allows the examination of both between group and within group variability as well as how group level and individual level variables are related to variability at both levels.
Therefore, it is important to know the factors that influence students' intentions to launch a new start-up or entrepreneurship effort at student level characteristics and university level characteristics. There are still limited researches on this issue even though entrepreneurship has been viewed as essential to economic development and growth (Fayolle & Gailly, 2013;Karimi et al., 2014). In relation to this, there is a call to conduct a research to understand the determinants of students to involve in entrepreneurship and also to contribute to the development of understanding in this area. This study can help governmental institutions, agencies, academic, entrepreneurial educators, consultants, and advisors to find the appropriate solutions to foster entrepreneurship in universities and consequently in the society.

Perceived educational support and entrepreneurial intention
Perceived educational support has been recognized as a determinant of entrepreneurial intention. Previous researchers agree that entrepreneurial educational support through professional education in universities is an efficient method to equip the students with necessary knowledge about entrepreneurship (Ayalew & Zeleke, 2018, Mumtaz et al., 2012Turker & Selcuk, 2009). Entrepreneurship education also influences students' career choice (Peterman & Kennedy, 2003). In order to survive in today's intensified business world, the university is required to play a key role in promoting entrepreneurship. A study conducted among university students in Turkey found that university education has a positive impact on entrepreneurial intention (Turker & Selcuk, 2009). Turker and Selcuk (2009) argue that entrepreneurship education is resourceful for acquiring knowledge on entrepreneurship. This is consistent with the cross-cultural study conducted by Moriano, Gorgievski, Laguna, Stephan, and Zarafshani (2012). Similar study has been conducted in Malaysia found that appropriate entrepreneurship education exposure will influence the students to be an entrepreneur (Mumtaz et al., 2012). The study by Autio, Keelyey, Klofsten, and Ulfstedt (1997) that investigated entrepreneurial intention of university students in various cultural contexts indicated also that the encouragement from university environment affects the entrepreneurial confidence of university students. This is supported by the study done by Wang and Wong (2004) who pointed out that entrepreneurial dreams of many students are hindered by inadequate preparation of the academic institution. The school and education system also play a critical role in identifying and shaping entrepreneurial traits (Ibrahim & Soufani, 2002). Other studies have pointed out that entrepreneurship education, especially education that provides technological training, is crucial to enhance entrepreneurs' innovation skills in an increasingly challenging environment (Kuratko, 2005;Galloway & Brown, 2002). They stated in their research as proper entrepreneurship education exposure will enables students to have positive attitudes towards choosing entrepreneurship as a career. University education plays strong role in promoting entrepreneurship as a career choice by providing necessary exposure through theoretical and practical knowledge about entrepreneurship. Thus, it can be hypothesized that: Hypothesis 1: Perceived educational support has a positive impact on entrepreneurial intention.

Personal attitude and entrepreneurial intention
It represents the person's way of evaluating and comparing an object against the available options with the basis of on an individual's thought (cognition), belief (values) and emotions (affection) towards the object (Hoyer & MacInnis, 2004). In the literature, some scholars have investigated the influence between entrepreneurial attitudes on students' entrepreneurial intentions. For instance, Nguyen (2017) has studied entrepreneurial intention among international business students in Vietnam. The result of the study confirms that attitude towards entrepreneurship and perceived behavior control is positively related to entrepreneurial intention. On the contrary, subjective norm fails to generate a significant impact on entrepreneurial intention. A research done by Kristiansen and Indarti (2004) also pointed out that access to information and finance are also an important element for the intention to establish a new business. This may be achieved through effective communication whereby information is captured properly and feedback is provided. High achievements on creativity and prior entrepreneurial experiences have also a direct relationship with entrepreneurial preferences, whereas perception of failure has an indirect influence (Davey, Plewa, & Struwig, 2011;Hamidi, Wennberg, & Berglund, 2008;Okpara, 2007). The approaches of entrepreneurial intention studies focus on personal characteristics (risk-taking, propensity, tolerance for ambiguity, internal locus of control, innovativeness and independence) and motivational factors (love for money, desire for security and desire for status), rather than the differences in contextual factors (Ang & Hong, 2000;Henderson & Robertson, 2000;Wang & Wong, 2004). Other researchers also pointed out that students who seek information and opportunity are more likely to be self-employed than non-seekers (Hamidi et al., 2008). Furthermore, creativity and problem-solving skills are also among the most important determinants of entrepreneurial intention among undergraduate university students. The finding of previous studies shows that students who have high level of creativity and problem-solving skills have the highest intention to be self-employed (Hamidi et al., 2008;Ismail, Jaffar, & Hooi, 2013;Okpara, 2007). The study of Turker, Onvural, Kursunluoglu & Pinar (2005) also considered the impacts of both internal factors (motivation and self-confidence) and external factors (perceived level of education, opportunities, and support) on entrepreneurial propensity of university students. The study found that two internal factors and perceived level of support were statistically significant factors. Thus, it leads to the following hypothesis: Hypothesis 2: Personal attitudes has a positive impact on entrepreneurial intention.
• Hypothesis 2a: information and opportunity seeking ability has a positive impact on entrepreneurial intention. • Hypothesis 2b: creativity and problem-solving skill has a positive impact on entrepreneurial intention. • Hypothesis 2c: self-confidence and self-esteem has a positive impact on entrepreneurial intention. • Hypothesis 2d: networking and professional contacts has a positive impact on entrepreneurial intention. • Hypothesis 2e: goal setting has a positive impact on entrepreneurial intention. • Hypothesis 2f: achievement and instrumental readiness has a positive impact on entrepreneurial intention.

Perceived Relational support and entrepreneurial intention
Relational support refers to the approval and support from the family, friends, and others to involve in entrepreneurial activities (Turker & Selcuk, 2009). Family and friends are the person that have a great influence on individual career choice because they are considered as fund providers and role models. Therefore, the support of family and friends is likely to affect one's career selection. It is found in the literature that the role of friends and role models is prominent in influencing the decisions to become an entrepreneur (Nanda & Sorensen, 2010). The importance of the role models on the inclination towards entrepreneurship is widely discussed in the literature (e.g., Karimi et al., 2013;Kirkwood, 2007). This is due to the fact that the role models often provide the necessary information, guidance, set a good example, and support (Postigo, Iacobucci, & Tamborini, 2006). By having a good example and support, the students are more prone and confident to become an entrepreneur. This will also motivate and inspire the individual to become a successful entrepreneur. The study conducted among young Australians concluded that friends significantly influence their decision to start a business (Nanda & Sorensen, 2010;Sergeant & Crawford, 2001). It is also found that, the support from family, friends and close network among 425 Turkish university students were positively influenced their decision to become an entrepreneur (Yurtkoru, Kuşcu, & Doğanay, 2014). Similarly, Altinay, Madanoglu, Daniele, & Lashley (2012) in a study of university hospitality students in the UK found that, family entrepreneurial background positively related to entrepreneurial intention. Supporting these, Zapkau, Schwens, Steinmetz, and Kabst (2015) also found that the parental role models positively influence entrepreneurial intention. Students who came from businessowned family are more likely to have entrepreneurial intention compared to students who came from non-business-owned families (Ayalew & Zeleke, 2018). The reason might be that they may have prior business experience from families. The experience gained from their family member may influence the students' engagement in entrepreneurship. This is in agreement with the findings in other studies (Dohse & Walter, 2012;Fitzsimmons & Douglass, 2005;Robson, 2015;Sanditov & Verspagen, 2011). In addition, availability of finance/capital is also regarded as one of the common obstacle to establish a new business (Kristiansen & Indarti, 2004). Access to finance is the ability of the individuals to find financial support to establish a business since most of the investors and banks are not willing to make investments in new ventures. Family background is also taken into account as a factor affecting entrepreneurial intention. For instance, the study of Henderson and Robertson (2000) showed that family was the second factor influencing career choice of respondents after their personal experience. Based on these findings, it can be hypothesized that: Hypothesis 3: Perceived relational support has a positive impact on entrepreneurial intention.
Hypothesis 3a: family business background has a positive impact on entrepreneurial intention.
Hypothesis 3b: business experience has a positive impact on entrepreneurial intention. Hypothesis 3 c: access to finance has positive impact on entrepreneurial intention.

Socio-economic factors and entrepreneurial intention
Social factors have an encouraging or impeding effect on the intention of individuals for entrepreneurial career. Family background, education, previous work experience, risk attitude, over-optimism, preference for independence, and the norms and values of a society influence the choice of individual's life careers, i.e., entrepreneurship or salaried employment (Sanditov & Verspagen, 2011). In related study, other scholars also confirmed that family business background, subjective norm, and perceived behavioral control significantly predicts students' interest in entrepreneurship (Osakede, Lawanson, & Sobowale, 2017). Entrepreneurship is historically associated with risk taking. In the literature on entrepreneurship, thus, entrepreneurs are generally characterized as having a greater propensity to take risks than other groups (Cromie, 2000; Thomas & Mueller, 2000). Based on this finding, it can be hypothesized that:

Hypothesis 4: socio-economic factors have a positive impact on entrepreneurial intention of students.
Hypothesis 4a: means of finance has an impact on entrepreneurial intention.

Hypothesis 4b:
Risk taking commitment has an impact on entrepreneurial intention.

Hypothesis 4c: colleagues business background has an impact on entrepreneurial intention.
Hypothesis 4d: family occupation has an impact on entrepreneurial intention.

Hypothesis 4e: clear future business idea has an impact on entrepreneurial intention
Hypothesis 4f: discouragement by external environment has an impact on entrepreneurial intention.

Demographic factors and entrepreneurial intention
Many scholars study the relationship between demographic factors such as gender, age, marital status, etc. and entrepreneurial intentions. Their studies have explained the variation in entrepreneurial activity across countries by using a variety of determinants, mainly individual and economic factors that have received greater attention in the entrepreneurship literature (Thornton, Ribeiro-Soriano, & Urbano, 2011). Thus, many empirical studies have found evidence of a significant relationship between the probability of being or becoming an entrepreneur and individual attributes such as age, gender and education. Thus, many empirical studies have found evidence of a significant relationship between the probability of being or becoming an entrepreneur and individual attributes such as age, gender and education. The effect of gender on the probability of becoming an entrepreneur is demonstrated in several previous studies which found that males show a higher level of interest than females in creating new businesses (Minniti, Bygrave, & Autio, 2005;Mueller, 2004). Thus, women are less attracted to entrepreneurial activity than men. Moreover, scholars indicate that gender influences both preference and actual engagement in entrepreneurial activity (Minniti et al., 2005;Reynolds, Bygrave, Autio, Cox, & Hay, 2002). More recently, Liang, Wang, and Lazear (2018) even confirmed an inverted U-shaped relationship between entrepreneurship and age due to the fact that in spite of business skills increasing with experience, creativity may decline with age. Their model also implies that older societies have lower rates of entrepreneurship at every age. Wang and Wong (2004) also explained entrepreneurial interest of students in Singapore based on personal background. The study reveals that gender, family business experience, and education level are significant factors in explaining entrepreneurial interest. The study of Henderson and Robertson (2000) also provided a useful insight into perception of young adult on entrepreneurship. The study shows that the respondents perceived entrepreneurs mostly with their innate characteristics. However, most of them thought that entrepreneurial traits should be nurtured by external factors. Based on these findings, it can be hypothesized that: Hypothesis 5: demographic factors are associated with entrepreneurial intention.
Hypothesis 5a: gender has an impact on entrepreneurial intention. Hypothesis 5b: age has an impact on entrepreneurial intention.

Theoretical Framework
The purpose of this study is to identify the determinants of students' entrepreneurial intention to be an entrepreneur. In the light of the above literature review, the theoretical framework in this study depicted in Figure 1.

Research design
This study was carried out through a survey method, using questionnaires as the main instrument. The population for this study was final year undergraduate engineering students in Bahir Dar University (BDU), Debre Markos University (DMU) and University of Gondar (UoG) in Ethiopia in 2016/2017 academic session. These groups of students were chosen because they were suitable to conduct a research on entrepreneurial intention of students as they were facing important career decisions on completion of their studies, of which entrepreneurship could be one of them. Data were collected using a closed-ended self-administered questionnaire from a sample students selected from target population of final year undergraduate engineering students in the academic year 2016/2017. The sample size was determined using Yamen's formulae (Yamane, 1967) at a 5% level of precision. The formulae is given here below.
Where n is the required sample size, N is the total number students for each university, and e is the level of precision. Concretely, 991 students in UOG, 908 students in DMU and 2428 students in BDU were actively enrolling in 2016/2017 academic session. Using the equ (1), the estimated sample size for each university was 285 for UoG, 278 for DMU, and 344 for BDU (total, 907).
A stratified sampling technique was employed to identify the final participant from their respective departments. Samples were grouped in terms of their department. With proportionate stratification, the required sample size for each department is also determined by Cochran's (1979) formulae at 5% level of precision. The equation is given here below.
Where n represents total sample size, N i represents population size of the i th strata and N represents the population size.  Engineering students were selected and participated in the study. The sample size required in this study was 907 students. However, this study involved 921 final year university students who were registered for various engineering degrees. The collected data were analysed through SPSS.
The response variable of this study was entrepreneurial intention of students and the independent variables are student-level variables (perceived educational support, perceived relational support, entrepreneurial attitudes, socio-economic characteristics and demographic factors) and university-level variables. For the purpose of this study, the dependent variable classified students as who have entrepreneurial intention and who do not have intention. The dependent variable (entrepreneurial intention) and the predictor variables, i.e., personal attitudes of respondents were measured by providing five -point Likert scale item, ranging from "1 = strongly disagree to 5 = strongly agree."

Structural Model
The analytical method used in this research is multilevel binary logistic regression model with two levels. In this research, we considered three multilevel regression models.

Empty model
The empty two-level model for a dichotomous outcome variable refers to a population of groups (level-two units, i.e., university)) and specifies the probability distribution for group-dependent probabilities without taking further explanatory variables into account. This model only contains random groups and random variation within groups. It can be expressed with logit link function as follows.
logit Pr: Where: ; 0j eIIDð0; σ 2 ; ), σ 2 ; is the variance in the population distribution, and therefore the level of heterogeneity of observations in the data structure and ; 0j is the random deviation from this average for group j. It means that the random effect of being in group j on its within observations (on the log-odds that Y = 1); also known as a level 2 residual.

Fixed-effect model
The fixed effects binary logistic regression for two-level model for data obtained from N individuals (students), nested within J groups (universities), each containing N J individuals, is specified as follows. For each group j (j = 1, 2 . . . J), the Level-1 or withingroup model is given by: Where: ; 0j eIIDð0; σ 2 ; ), Y is an N � 1 a vector of observations for the response variable, X is an N � K matrix of fixed effect predictors, β is a K � 1 vector of fixed effect regression coefficients, ; 0j is the effect of being in group j on the log-odds that Y = 1; also known as a level-2 residual, σ 2 ; is the level-2 (residual) variance, or the between-group variance in the log-odds that Y = 1 after accounting for X.

Random effect model
Let Y ij denote the binary response variable measured on the i th subject within the j th cluster (i = 1 . . . N j ; j = 1 . . . J). Y ij = 1 denotes success or the occurrence of the event, while Y ij = 0 denotes failure or lack of occurrence of the event. Furthermore, let X 1ij , through X kij denote the k fixed effect predictor or explanatory variables measured on this subject (i.e., students' characteristics). Finally, let Z 1j , through Z mj denote the m random effect predictor variables measured on the j th cluster (i.e., university characteristics). Now, the model is specified as follows.
logit Pr: Where: ; 0j eIIDð0; σ 2 ; ), Y is an N � 1 a vector of observations for the response variable, X is an N � K matrix of fixed effect predictors, β is a K � 1 vector of fixed effect regression coefficients, Z is an N � m matrix of random effect predictors, α is an m � 1 vector of random effect regression coefficients and ; 0j is an N � 1 vector of observation for random error terms.

Estimation Techniques
In this paper, Maximum likelihood and Bayesian estimation methods are used for estimating the fixed components and variances of the random components in hierarchical models.

Classical Approach
The likelihood of n independent measurements, given vectors of parameter θ (unknown parameter βand; 0j ) and explanatory variables X i is expressed generally as:

Bayesian Approach
Mathematically, Bayesian inference was formulated as follows. The parameters θ are unknown and thus have their own prior distribution, P (θ). The prior distribution is (Gelman et al., 2004) is defined as and the posterior distribution, P θ=Y ð Þ, can be obtained by mathematically combining the likelihood and prior with the use of Bayes' Theorem. The result is as follows.

P θ=y
The parameters of the fixed and random components were estimated based on Markov Chain Monte Carlo (MCMC) simulation techniques using Random-walk Metropolis-Hastings sampling. Samples from the posterior distribution are repeatedly taken, creating a distribution of sampled values. The samples are then compiled into a distribution used as the posterior. The sampling process starts with a single value and iteratively converges to the posterior. Multiple starting values are used to produce separate "chains" of resampling. These chains are then combined after thousands of iterations. With enough samples the empirical posterior will approach the mathematical posterior. To determine if enough sampling has occurred, visually monitoring the chains for convergence is recommended. This is accomplished by plotting the sampled values of each chain. If all values fall within a consistent range, then convergence to the posterior distribution has been achieved. As a result of sampling variability within chains, parameter estimates for the exact same data may not be identical if the same analysis is conducted again. For each model, three chains of 12,500 iterations were set up in the software and 2,500 iterations were used in the burn-in step. Convergences of the models were checked by monitoring the MCMC trace plots (time series, Density, autocorrelation, Gelman Rubin) for the model parameters: if all values were within a zone without strong periodicities or tendencies, the model was considered convergent.

Descriptive results
As mentioned previously, this study involved 921 final year undergraduate university students who enrolled in various engineering programs.

Factor analysis and reliability analysis
A pilot study was carried out to revise the questionnaire and for item analysis. The validity and reliability of the questionnaire was measured. Exploratory factor analysis was performed to determine the underlying factorial structure of the scale. The eigenvalues greater than 1.0 was retained for the analysis. The internal consistencies or reliability of scale were assessed through computing Cronbach's alpha. The components of factor affecting entrepreneurial intention show the reliability value 0.917 and this is above the recommended threshold value 0.70 loadings. Implication from these values indicates that items used to represent construct have satisfactory internal consistency reliability. In order to test the validity and adequacy of constructs of the questionnaire, Kaiser-Mayer-Olkin (KMO) and Bartlett's Test of Sphericity statistics are used. The result of the analysis shows all constructs have KMO value for the dimension of intention and attitude was 0.885 and 0.947 respectively, which demonstrates an adequate validity. A KMO value greater or equal to 0.70 is considered as adequate (Meyers et al., 2006). The Bartlett's Test of Sphericity for intention and attitude (x 2 = 2295.047 and −13, 322.545 with p-value = 0.000) respectively was also significant at 5% level. Theses value of KMO and Bartlett's Test of Sphericity statistic shows us the appropriateness to apply exploratory factor analysis for the constructs or items of response variable and predictor variables.

Null Model (Model 1)
We first fit a simple model with no predictors i.e., an intercept-only model that predicts the probability of students' entrepreneurial intention. The estimates of parameters and standard errors are presented in Table 2. The ML estimate from the standard logit model of the ratio of a student who have entrepreneurial intention to who don't have intention is exp (0.306) = 1.361, which is the same as the sample ratio of the number of students who have entrepreneurial intention to who don't have. It is in fact odds-ratio when no predictors have been considered in the model. In comparison, the same ratio is estimated to be exp (0.3295) = 1.39 and exp (0.3271) = 1.387 from the multilevel model by the ML (in Table 2a) and MCMC (in Table 2b) methods respectively. A crude comparison has been made to understand the multilevel effects. Compared to the odds-ratios obtained by all multilevel methods the standard logistic model odds-ratio has underestimated. It is observed that there is a significant difference between the standard logistic estimate and the multilevel logistic estimate. Therefore, by failing to take into account the clustering within university (level 2), the standard logistic model has underestimated the odds-ratio by about 7% [(0.306-0.3295) *100/0.3295] and 6.5% compared to multilevel model using by the corresponding methods ML and MCMC (see Table 2a and 2b).
In Table 2a, the estimated intercept was 0.3295, while the estimated variances of the random effect were 0.2929. Thus, at an average university (i.e., a university whose random effect was equal to zero on the logit scale), the probability of entrepreneurial intention was exp 0:3295 ð Þ= 1 þ exp 0:3295 ð Þ ½ � ¼ 0:58. The 95% probability interval for the university-specific intercepts is (0.0949,0.4909) (i.e., 95% of university will have a random intercept that lies within this interval). The estimated variance (unobserved heterogeneity) of the random intercepts using ML and MCMC are 0.2929 (Std. Error 0.1010) (see in Table 2a) and 0.2809 (std. error 0.0975) (see in Table 2b) respectively. Both estimates are significantly different from zero and indicate considerable heterogeneity in entrepreneurial intention with respect to students and university that is unaccounted for by the predictor variables and should be adjusted for an adequate analysis.
(1) Fixed Effect Model (Model 2): In this model, student level variables were included in the model to determine the effect of each predictor variables on students' entrepreneurial intention. The results were presented in Table 3.  In the model consisting of student-level variables or characteristics (Model 2), 10 of the 18 student characteristics were significantly associated with the odds of their entrepreneurial intention (Table 3a and Table 3b). In the meanwhile, parents' occupation, systematic planning, colleagues' business background, means of finance, discouragement by external environment, risk taking commitment, number of entrepreneurs' respondents knows and clear future business idea are not significant predictors at 5% level of significance.
The intercept for this model was 0.2570. Thus, at an average university (i.e., a university whose random effect was equal to zero), the probability of entrepreneurial intention for a student whose covariates were equal to zero was expo 0:2570 ð Þ= 1 þ expo 0:2570 ð Þ ½ � ¼ 0:564: In Table 3a, the variance component representing variation between university has decreased from 0.2929 in the empty model to 0.2802 in the fixed effect model and the significance of it indicates that there is a significant variation between student's entrepreneurial intention who placed in different university. Table 3a and Table 3b shows us that there is clear difference between the values of β coefficients of covariates in the model which estimated by classical and Bayesian approach. When Bayesian multilevel effects have not been taken into consideration as compared to classical approach, the β coefficients have been underestimated or overestimated for the covariates. For instance, for the variables goal setting (GS) and information and opportunity seeking (IOS), the β coefficients of the multilevel model estimated by classical approach have been underestimated by almost 3% and 2% respectively. On the contrary, the β coefficients for the covariates, systematic planning (SP) and self-confidence and self-esteem (SCSE) factor score, the β coefficients of the multilevel model using classical approach has been overestimated by 85% and 13%, respectively. Hence, β coefficients are distorted somewhat in both directions either in over or under direction from the true value when Bayesian multilevel effects are not taken into consideration in modeling.

Random Effect Model (Model 3)
Random effect model allows the effect that the coefficient of the explanatory variable to vary from cluster to cluster. In this model, we considered student level variables (at level 1) and university level variables (at level 2). In the model that included both student and university characteristics (Model 3), ten of the 18 student characteristics were significantly associated with the log-odds of entrepreneurial intention, while only one of the three university characteristics (Perceived entrepreneurial educational (EE) support) was significantly associated with the outcome (odds ratio = 0.9958, 95% CI = (0.8619, 1.1297)) ( Table 4a). Neither business counseling (odds ratio = 0.9958, 95% CI = (0.8619, 1.1297)) nor exchange of thoughts, ideas and experiences by invited guests (odds ratio = 1.0187, 95% CI = (0.8836, 1.1537)) was significantly associated with student's entrepreneurial intention. This means that there is no significance difference between students who enrolled in those university that provide business counseling service and those university that didn't provide this service in their entrepreneurial intention. Also, there is no significant difference between student's who enrolled in those university that shares or exchanges thoughts, ideas and experiences by invited guests and those university who did not invite any guests for business discourse in their entrepreneurial intention. The intercept for this model was 0.2498 (see in Table 4a). Thus, at an average university (i.e., a university whose random effect was equal to zero), the probability of entrepreneurial intention for a student whose covariates were equal to zero was expo 0:2498 ð Þ= 1 þ expo 0:2498 ð Þ ½ � ¼ 0:562. The results of random effect model are shown in Table 4a and Table 4b.
In Table 4a, the value of Var (intercept) and Var (EE) are the estimated variance of random effect intercept and slope of perceived entrepreneurial educational (EE) support respectively. These estimated variances are significant suggesting that intercept and slope of EE vary significantly. So, there is a significant variation in the effect of EE across university in Ethiopia. The random intercept for j th university is 0.2498 (0.0690) + ; 0j and their variance 0.2774 (Std. error = 0.0796) (see Table 4a). Thus, the value 0.2498 is the intercept for university j with ; 0j = 0 (i.e., the mean value of ; 0j ). The between-university variance of slope of EE is estimated to be 0.1273 (std. error 0.0439) and the individual university slopes of EE vary about with this amount.

Model Diagnostic
Once the results of the model are computed, it is important to check for the convergence of Markov Chain Monte Carlo. Figure 2 illustrates the convergence of the Bayesian with non-informative prior using the Gelman-Rubin Convergence Diagnostic test. The histogram of MCMC residual is normal. The trace plot also indicates that convergence was achieved. Correlation becomes negligible after 10 periods. The algorithm converged after 100, 000 iterations. To remove the autocorrelation and burning periods, a lag of 20 was considered and the first 35, 000 iterations removed. The output of Gelman-Rubin convergence diagnostic test displays the red lines representing the R . The graph shows that all the R ! 1 . Also, the blue and green lines which represent the within sample variance and the pooled posterior variance, are stationary. Thus, the Gelman-Rubin Convergence Diagnostic test suggests that the algorithm converges. The result of Table 4b revealed lower standard errors of the estimated coefficients in the Bayesian logistic regression approach as compared to classical approach (Table 4a). Moreover, the results revealed that the length of the Bayesian credible interval is smaller than the length of the maximum likelihood confidence interval for all predictor variables. Table 5 displays the AIC, BIC and DIC for classical approach and Bayesian approach for each model. The findings this research work indicates that random effect model (Model 3) is more plausible than Model 1 and Model 2. Bayesian approach is also more plausible than classical approach because DIC for Bayesian method demonstrated lowest value than AIC and BIC value for classical approach which denotes the better fits. This conclusion is similar with Pandey, Dwivedi, and Bandyopadhyay (2011), and Nasir and AI-Anber (2012) study in which the Bayesian method is superior compared to maximum likelihood estimation.

Discussion and Conclusion
Finding of this study reveal that entrepreneurial attitude significantly influences students' entrepreneurial intentions. The results conform to the literature that entrepreneurial  attitude has a positive relationship with Entrepreneurial intentions (Ayalew & Zeleke, 2018;Kolvereid, 2016;Mahendra et al., 2017;Soomro & Shah, 2015). Entrepreneurship education improves motivation towards being entrepreneurial by inspiring students' personal attraction towards entrepreneurship and perceived behavioral control (Dugassa, 2012;Gemechis, 2007;Sanditov & Verspagen, 2011). In a similar study by Tshikovhi and Shambare (2015), they found that high level of entrepreneurship education was observed among South African students to create favorable attitudes towards entrepreneurship. Similar findings have been established by several scholars (e.g., Welsh, Tullar, and Nemati, 2016;Alharbi, Almahdi, & Mosbah, 2018;Byabashaija & Katono, 2011;Fayolle & Gailly, 2013;Hattab, 2014;Nabi & Holden, 2008;Nabi, Liñán, Fayolle, Krueger, & Walmsley, 2017). They conclude that entrepreneurial training significantly improves the attitudes of students towards a choice of entrepreneurial career. This implies that when students are equipped with the ability recognize business opportunities and business knowledge like marketing, this stimulates their positive towards entrepreneurship. This is consistent with our findings. The result of this research indicates that students who placed in university that delivers entrepreneurshiporiented courses were 5.493 (OR = 5.493) times higher than those students who placed in those university that didn't deliver entrepreneurship-oriented courses while controlling other variables. In conclusion, Hypothesis 1: Perceived educational support has a positive impact on entrepreneurial intention is supported.
Students who came from business-owned family are more likely to have entrepreneurial intention compared to students who came from non-business-owned families. Table 4a tells us that students who came from business-owned families were 25.4% (OR = 1.838) more likely to have entrepreneurial intention compared to students who came from non-business-owned families. The reason might be that they may have prior business experience from families. The experience gained from their family member may influence the students' engagement in entrepreneurship. This is in agreement with the findings in other studies (Dohse & Walter, 2012;Fitzsimmons & Douglass, 2005;Robson, 2015;Sanditov & Verspagen, 2011). Similarly, the odd of entrepreneurial intention of students who have prior business experience from their family was 47.6% more likely to have entrepreneurial intention than students who have no any prior business experience from their family controlling other variables.
In the literature, some scholars have investigated the influence between entrepreneurial attitudes on students' entrepreneurial intentions. For instance, Nguyen (2017) has studied entrepreneurial intention among international business students in Vietnam. The result of the study confirms that attitude towards entrepreneurship and perceived behavior control is positively related to entrepreneurial intention. The need of student on self-employment can be achieved through effective communication whereby information is captured properly and feedback is provided. This research comes up with the evidence that there is a significant difference in entrepreneurial intention status of students between information and opportunity seekers and non-seekers. The seekers have high intention (OR = 3.818) to be entrepreneurs than non-seekers. Other researchers also pointed out that students who seek information and opportunity are more likely to be self-employed than non-seekers (Hamidi et al., 2008). Furthermore, creativity and problem-solving skills are also among the most important determinants of entrepreneurial intention among undergraduate university students. According to this research findings, students who have high level of creativity and problem-solving skills are more likely to engage in entrepreneurship activity (OR = 1.472) than students who have low level of creativity and problem-solving skills. This finding is also in line with other previous studies (Hamidi et al., 2008;Ismail et al., 2013;Okpara, 2007). These show that students who have high level of creativity and problem-solving skills have the highest intention to be self-employed. Moreover, a student who sets meaningful and challenging goals for him/her has more likely to be entrepreneur than student who did not set goals. Some studies have also revealed that entrepreneurial intention increases if the individuals have high self-confidence and self-esteem (Ismail et al., 2013). Our findings are in agreement with this fact. Students who have high self-confidence and self-esteem are more likely (OR = 1.493) to engage in entrepreneurship than from less confident students. In analyzing the findings, this research found evidence that networking and professional contact and goal setting to their future career have positive contribution to the entrepreneurial intention of students. From the result of the study, a student who establishes relationship, professional contacts and networks with business person had higher probability (OR = 1.641) of being entrepreneurs than students who did not make any professional contacts and networks because an entrepreneur acts to develop and maintain business contacts by establishing good working relationship and uses deliberate strategies to influence others. The ability to establish and maintain positive relationship is crucial to the success of the students' business venture (Turkina, Assche, & Kali, 2016). In conclusion. Hypothesis 2: Personal attitudes has a positive impact on entrepreneurial intention is supported.
The effect of support from family and friends on entrepreneurial intention is studied by different scholars. For instance, the study conducted among young Australians concluded that friends significantly influence student decision to start a business (Nanda & Sorensen, 2010;Sergeant & Crawford, 2001). It is also found that, the support from family, friends and close network among Turkish university students were positively influenced their decision to become an entrepreneur (Yurtkoru et al., 2014). Similarly, Altinay et al. (2012) in a study of university hospitality students in the UK found that, family entrepreneurial background positively related to entrepreneurial intention. Supporting these, Zapkau et al. (2015) also found that the parental role models positively influence entrepreneurial intention. In addition, availability of finance/capital is also regarded as one of the common obstacle to establish a new business (Kristiansen & Indarti, 2004). Access to finance is the ability of the individuals to find financial support to establish a business since most of the investors and banks are not willing to make investments in new ventures. Family background is also taken into account as a factor affecting entrepreneurial intention. For instance, the study of Henderson and Robertson (2000) showed that family was the second factor influencing career choice of respondents after their personal experience. The finding of this research work is in line with the previous research works in such a way that family business background, business experience of students and access to finance are a contributing risk factor for student's entrepreneurial intention. The odd of entrepreneurial intention of students who have access to finance/capital was about 23.2% (OR = 2.232) times higher than the odd of entrepreneurial intention of students who do not have access to capitals controlling for other variables in the model. In conclusion, Hypothesis 3: Perceived relational support has a positive impact on entrepreneurial intention is supported.
In the literature on entrepreneurship, thus, entrepreneurs are generally characterized as having a greater propensity to take risks than other groups (Cromie, 2000; Thomas & Mueller, 2000). Social factors have an encouraging or impeding effect on the intention of individuals for entrepreneurial career. Other scholars find an evidence that the norms and values of a society influence the choice of individual's life careers (Sanditov & Verspagen, 2011). The result of this research work is inconsistence with the result of previous researches. In conclusion, Hypothesis 4: socio-economic factors have a positive impact on entrepreneurial intention of students is not supported.
The effect of gender on the probability of becoming an entrepreneur is demonstrated in several previous studies which found that males show a higher level of interest than females in creating new businesses (Minniti et al., 2005;Mueller, 2004;Reynolds et al., 2002). On the contrary, the result of this research revealed that gender doesn't influences both preference and actual engagement in entrepreneurial activity. More recently, Liang et al. (2018) even confirmed an inverted U-shaped relationship between entrepreneurship and age due to the fact that in spite of business skills increasing with experience, creativity may decline with age. Their model also implies that older societies have lower rates of entrepreneurship at every age. The finding of this research is in agreement with this fact. The reason may be the respondents in this research have the same age group, i.e., 18-25 years old. In conclusion, Hypothesis 5: demographic factors are associated with entrepreneurial intention is not supported.
From the above discussion, we conclude that perceived educational support, personal attitude and perceived relational support are the significant predictors of entrepreneurial intention of students at 5% level of significance. on the contrary, demographic variables (like gender and age) and socio-economic related variables (like means of finance, parents' occupation, risk taking commitment, colleagues business background, clear future business idea, discouragement by external environment, etc.) doesn't have any impact on their entrepreneurial intention at 5% level of significance. This research also compares the standard error and length of regression coefficients of ML estimation and Bayesian estimations. The results reveal that the Bayesian estimation approach provides lower standard errors of the regression coefficients as compared to classical approach. Moreover, the results also revealed that the length of the Bayesian credible interval is smaller than the length of the maximum likelihood confidence interval for all factors. In order to identify the most plausible method between Bayesian and ML estimation of the data, AIC, BIC and DIC were employed. The result of the study depicts that the Bayesian method performs better and more efficient than maximum likelihood estimation.

Recommendation
Based on the finding of this research work, the following recommendation is proposed for the academic institutions, regulators and practitioners.
• The government as well as the university should design program that facilitate entrepreneurship trainings to change the mindset, attitude, and intention of those students who don't have an idea about entrepreneurship as a future career.
• The policy makers and educators should develop a strong culture and support system for entrepreneurship through offering public courses and training and removing the obstacles in the process of establishing new ventures specifically by university students. • The government and university should maintain and strength the cooperation and contacts between students, fund raisers, and entrepreneurs. • Educators should involve students in business plan writing, case studies and running a small new business rather than stressing only on entrepreneurship theories and traditional methods of teaching entrepreneurship. • Universities and policy makers should encourage the development of creative ideas for being an entrepreneur, provide the necessary knowledge about entrepreneurship, and develop the entrepreneurial skills of the students. • Educational and economic policymakers should design policies and programs like startup capital that are intended towards enabling graduates to realize their entrepreneurial intentions. • Policy makers should give highest priority to the educational and perceived relational supports to students to generate the entrepreneurs of future.

Limitations and Areas of Future Research
The current study is subject to some limitations. The study employed a cross-sectional design.
Firstly, similar to the previous studies in the literature, the study focuses on the intentionality. It is clear that intentions may not turn into actual behaviors in the future. Even if one respondent stated a high entrepreneurial intention in the survey, she/he might choose a completely different career path in the future. Therefore, future research could employ a longitudinal approach to determine whether entrepreneurial attitude and entrepreneurial intentions are maintained or change after graduating from university.