Fiscal spending and green economic growth: fresh evidence from high polluted Asian economies

Abstract Green growth is deliberated as an effective way for attaining environmental sustainability, but the nexus between fiscal spending and green growth is ignored in highly polluted Asian economies. To fill this gap, this study attempts to investigate the impact of public sector education and research and development expenditures on green economic growth for selected Asian economies for the period 1991–2019. The study employed FMOLS and DOLS methods to assess the association between public expenditures on education and research and development sectors and green economic growth. The study found that education and research and development expenditures both contribute significantly to enhancing green economic growth in most of the selected Asian economies. The study proposed some important policy implications for fostering green economic growth and environmental sustainability by mitigation of pollution emissions.


Introduction
Global environmental pollution and climatic change urge environmentalists and policymakers to produce new solutions for sustainable growth. The green economy is among the effective solutions for achieving sustainability, which concentrates on economic development, resource protection, and environmental friendliness (Bina, 2013;Ying et al., 2021). The green economy is considered as an instrument to enhance social well-being and equity, while considerably mitigating environmental scarcities and risks (Raleigh & Urdal, 2007). The increasing environmental calamities have made green growth a strategic choice in attaining sustainable development objectives (Burke & Stephens, 2018). The concept of green growth has stimulated extensive concerns around the globe and is considered an effective way for raising economic development, saving resources, and reducing environmental degradation (Hallegatte et al., 2012). Some organizations and studies have made a proper definition of green growth improve resource and energy efficiency, and development of green energy infrastructure for the reduction in CO2 emissions (Liu et al., 2018;Sun et al. 2020). Consequently, green economic growth has been recognized as a new mechanism for economic development around the globe (Rodriguez-Gonzalez et al. 2018). Previous studies have precisely defined the concept of green economic development (see for instance ;Ekins, 2002;Barbier, 2011;Luukkanen et al., 2019;Cheng et al., 2021). Nieto et al. (2018) studied the association between green economy, sustainable development, and dimensional characteristics of the green economy. Fiscal spending is not adequate to attain goals of green growth and SDGs set by the United Nations (Sachs et al., 2019). Hence, the government allows green economic projects to attract more private green investments ). An economy can preserve green resources and create low carbon emissions by adopting green economic projects (Lin and Jia 2019). Several studies denoted that employment generation and environmental safety can support green growth in confirming economic progress (Hallegatte et al. 2019).
Previous studies have discussed several other factors that affect green growth such as Wang et al. (2019) study incorporated economic and social status, population, and level of education to examine variations in green economic growth. Lin and Zhu (2019) explored how the green economic development of China is influenced by technological shocks, efficiency, and lack of efficient practices. Shu et al. (2016) investigated how resource-intensive cities have more opportunities of generating pollution emissions by considering green and natural resources to affect the green economic growth of China. Paramesh (2018) investigated the evolution of Asian economies towards green economic growth by fiscal instrument and concluded that these economies materialize the transition at a slow speed. Lin and Zhu (2019) explored the impact of public sector education spending and R&D on the green economic growth of China. Zhang et al. (2021) explored the association between fiscal spending on R&D, energy efficiency, and green economic growth. Due to dependence on the nonrenewable energy sector and industrial sector, green economic growth has enhanced, but the gradual environmental pollution mitigates (Montalbano & Nenci, 2019). The development targets can be attained through living standards and energy (Usman et al., 2021). Particular indicators play contribute significantly to the failure of green economic growth, like over-dependence on the non-renewable energy sector, inadequate fiscal spending on R&D, and unsuitable environmental planning .
Asia is the largest continent and also the biggest contributor to CO2 emissions. Thus, these high-polluted Asian economies become an ideal choice in scrutinizing the influence of fiscal spending on green economic growth. We have tried to analyze the impact of fiscal spending on green growth in highly polluted Asian economies. For empirical analysis, the study will use data set of selected Asian economies from 1991 to 2019 by employing NARDL approach. This study contributes to the existing literature in the following ways. Firstly, the findings of the study will add to the understanding of the contribution of fiscal spending in the market mechanism by suggesting that fiscal spending on public goods is helpful to lessen the risk of market failure. Secondly, the study helps in policy formulation, as green economic growth requires a balance association between environmental protection, energy conservation, and economic development, and these all are directly affected by government regulatory policies. This study also helps in the modification of green economies policies.

Model and methods
Following earlier empirical and theoretical literature Jacobs (2012) and Lin and Zhu (2019), we assume that the main determinants of green growth are fiscal spending, internet, financial development, and clean energy consumption. Therefore, we begin with the following econometric models: Where GEG it represents green economic growth, but EE it and RD it separately represents public educational expenditure and R&D expenditure in the model. The fiscal spending produces a positive significant impact on green economic growth (Lin & Zhu, 2019;Zhang et al., 2021), we expect estimates of u 1 and u 2 to be negative. WhereInternet it , Internet it , FD it , and REC it separately represent control variables and named as internet users, financial development, and renewable energy consumption. In model, subscripts i ¼ 1, … .,N signifies the country, t ¼ 1, … .,T indicates the time separately.
While u 0 denotes the intercept, u 1 -u 5 are coefficients to be estimated, and a i is unobservable individual effects, and eit is a random error term. Thus, Eq. (1) is a standard panel data model. Our data has two dimensions one spreads across time and the other across cross-sectional units. Such type of data is known as panel or longitudinal data, and this type of data has many advantages over time series and crosssectional data. The first and foremost advantage of panel data is that it combines the observations across time and cross-section; therefore, the number of observations increases manifold. Along with the increase in the number of observations, we enjoy the luxury of more variability, information, efficiency in our panel data set as compared to the cross-section and time-series data set (Baltagi, 2008). As the data, we have used in the analysis is panel; hence, such type of data requires special econometric techniques such as fixed effect model (FEM), random effect model (REM), and generalized methods of movement (GMM). However, these techniques are applicable in the type of data where T is small, and N is large. Conversely, different panel estimation techniques like pooled OLS (POLS), dynamic OLS (DOLS), and fully modified OLS (FMOLS) are appropriate when T and N are both large.
In POLS, we add all the time series and cross-section observations and then estimate them with the help of a single regression without taking into consideration the time-series and cross-sectional properties of the data. POLS is an efficient estimator when we use a different sample for each time dimension in a panel data set (Wooldridge, 2010). However, a major disadvantage of POLS is that it can't consider the unobserved heterogeneity; therefore, it provides inconsistent results (Gaibulloev et al., 2014). The problems encountered while applying the POLS technique can be resolved with the help of more advanced and sophisticated techniques like FMOLS and DOLS. Both these estimators are highly efficient even in the presence of endogeneity among regressors and serial correlation in error terms. To solve the problems mentioned above FMOLS technique applies a non-parametric approach. Conversely, the DOLS applies a parametric approach by including leads and lags values to deal with the issues of endogeneity and serial correlation (Kao & Chiang, 2001). Moreover, DOLS is a good estimator in the case of a small number of observations (Dogan & Seker, 2016). Another problem that makes the panel data results biased is the problem of cross-sectional dependence. An added advantage of the DOLS technique is that it can obtain country-specific coefficients that provide unbiased and consistent results in the case of cross-sectional dependence. Further, the issues of heterogeneity in the long-term variance, and cointegrated panel can be resolved with the help of weighted criteria of FMOLS and DOLS.

Data
This study explores the dynamic effects of fiscal spending on green growth in the case of highly polluted Asian economies named China, India, Russian, Japan, Saudi Arabia, Korea, Rep., Indonesia, and Turkey for the period 1991 to 2019. For that purpose, green growth is a dependent variable, education and research & development expenditures are independent variables, while internet, financial development, and renewable energy consumption are taken as control variables. Green growth is measured by environmentally adjusted multifactor productivity. Government expenditures on education as percent of GDP are used to measure education expenditures. Research and development expenditures are measured in terms of percentage of total GDP. Internet variable is measured by individuals using the internet as percent of population. Domestic credit of private sector in percent of GDP is used to measure financial development. Renewable energy consumption is taken as energy consumption of nuclear, renewables and others. All the data for this study have been extracted from the World Bank and OECD. A detailed description of the data is also reported in Table 1.

Results and discussion
Firstly, it is imperative to investigate the cross-sectional dependence when we are dealing with panel data in order to follow methods and strategies (Pesaran et al., 2004). As a first step, the study investigates the cross-sectional dependence of the data. Various cross-sectional dependence tests are proposed in the literature, but our study employed Pesaran's et al. (2004) cross-sectional dependence test, and the outcomes are displayed in Table 2. The findings of the cross-sectional dependence test suggest that the null hypothesis of no cross-sectional dependence is not accepted. Suggesting that if any positive or negative shock occurs in one economy; its spillover impact can be observed in the rest of all economies of the selected sample. The finding implies that cross-sectional dependence exists among the Asia region. As a second step, stationarity processes of the series have been confirmed in order to obtain the most valid decision regarding panel regression. For that purpose, the study conducts Levin-Lin-Chu (LLC) and Im-Pesaran-Shin (IPS) unit root tests which are capable of taking into consideration the cross-sectional dependencies across economies. The findings of both panel unit root tests are displayed in Table 3. The obtained coefficient estimates suggest that all the variables are stationary at their first difference, i.e., I(1). The first difference I(1) stationarity level calls for investigating cointegration association among variables as their linear combination could be level stationary. In this regard, Kao residual cointegration test has been employed, and the findings are displayed in the lower panel of Table 3. According to the findings of Kao cointegration test, it is suggested that cointegration exists among green economic growth, education and R&D expenditures, internet use, financial development, and renewable energy consumption. The validation of cointegration indicates the presence of a long-run relationship among the variables.
In the last step, the study employed FMOLS technique to empirically investigate the impact of fiscal green expenditures on green economic growth. In order to confirm the robustness of findings, the study also employed DOLS regression technique. The study adopted two proxies to measure the impact of fiscal expenditures, which are, education expenditures and research and development expenditures. Table 4 displayed group-wise coefficient estimates of FMOLS and DOLS approaches and   To conserve space, we are only describing the coefficient estimates of column 3 and column 6 in detail in Table 4. In column 3, the findings show that education expenditures and research and development expenditures are positively linked with economic growth revealing that due to an upsurge in both types of fiscal expenditures, green economic growth increases. Coefficient estimates divulge that in response of 1% upsurge in education expenditures and research and development expenditures, green economic growth raises by 1.010% and 1.610%, respectively. The estimation results reveal that public expenditures on education and R&D sector have a positive impact on green growth, revealing the existence of technique effect and composition effect. Similar results are reported in L opez et al. (2011); the study argued that the upsurge of fiscal expenditures on public goods can reduce carbon emissions significantly, such as wastewater and SO2 emissions. More precisely, the coefficient estimates of research and development expenditures are larger than the education expenditures, suggesting that the technical effect is larger which is opposite to the findings of Hua et al. (2018). The findings of control variables are almost according to our expectations. The potential impact mechanism of public  expenditures on green economic growth infers that research and development can promote technological progress, while education expenditures can enhance human capital-based activities. The complex nature of economy-wise results reveal that the selected economies are heterogeneous, and this diversity can be described in the following ways. All the economies have a similar influence on education expenditures in strengthening the growth of human capital. The fiscal budget for education expenditures is relatively higher in a few Asian economies, efficient human resources are developed, and the education standard is also good. At economy-wise analysis, research and development expenditures are also positively related to green economic growth. The evolutionary economics and neoclassical economic theories elaborated the importance of government expenditures in environment-friendly economic activities. Market failures can also be compensated by public expenditures on education and R&D that raise new technological innovations. Private-sector research and development expenditures are not enough to produce revolutionary solutions, thus, government sector financial support is mandatory for green growth (Zhang et al., 2021).
Regarding control variables, findings display that internet use and financial development have a positive impact on green economic growth while renewable energy production produces an insignificant impact. Coefficient estimates show that due to 1% increase in internet use and financial development, green economic growth increases by 0.010% and 2.330%, respectively. In case of the DOLS model, education expenditures and all control variables have a significant and positive impact on green economic growth, while research and development produce insignificant impact.
In Table 5, the economy-wise results show that education expenditures exert a positive impact on green economic growth in China, Japan, Saudi Arabia, Korea, Rep., and Indonesia. Coefficient estimates display that due to 1% increase in education expenditures, green economic growth increases by 2.080% in China, 0.660% in Japan, 1.090% in Saudi Arabia, 2.500% in Korea, Rep., and 2.930% in Indonesia. In terms of research and development expenditures findings reveal that green economic growth increases in China, Russia, Japan, Korea, Rep., Indonesia, and Turkey due to an upsurge in research and development expenditures.The findings reveal that a 1% increase in research and development leads to increasing green economic growth by 3.730% in China, 1.230% in Russia, 2.470% in Japan, 0.680% in Korea, Rep., 2.610 in Indonesia, and 2.150% in Turkey. Findings show that internet use has a significant impact on green economic growth in four economies and renewable energy consumption has a positive impact on green economic growth in five economies. However, financial development produces an insignificant impact on green economic growth.

Conclusion and implications
Green economic growth has great significance to attain sustainable development. Previous literature has explored the association between pollution emissions and fiscal spending but ignores the influence of public expenditures on green economic growth. In this study, the fundamental influencing determinants of green economic growth have been investigated for highly polluted Asian economies for the period 1991 to 2019. The study explored the effects of public spending on green economic growth. The study employed two proxy measures of fiscal spending, such as education expenditures and R&D expenditures. For empirical investigation, FMOLS and DOLS techniques have been adopted. The group-wise findings reveal that education expenditures and research and development expenditures both contribute significantly to enhancing green economic growth. However, the respective coefficient estimates of both measures display that research and development expenditures effect is larger than that of education expenditures effect on green economic growth. However, the economy-wise analysis produces heterogeneous influence in different regions with different degrees. In short, the findings of the study illustrate that education expenditures and research and development expenditures enhance the green economic growth through technological activities, but reveal different roles in different economies.
On the basis of these findings, this study put forward the following policy recommendations. The study reports the positive role of research and development in enhancing green economic growth, which suggests that initiatives are required to encourage green technological innovations by reforming financial development markets. Renewable energy consumption promotes green economic growth, which reemphasizes the significance of renewable energy consumption into the total energy consumption for achieving sustainable economic growth. As it is found that renewable energy consumption is the driving factor of green energy consumption, so governments should subsidize renewable energy sources and encourage the production of renewable energy in the private sector. It is also suggested that highly polluted Asian economies should improve their economic policies according to the environment and firmly implement environmental laws. Policymakers and governments should increase investment for environment-enhancing technologies such as increased spending for renewable energy sources, technological innovation, and research and development in the energy sector for sustainable economic development. Investing in research and development and environment-friendly technologies will reduce production-based pollution emissions as well. Therefore, stimulating collaboration on the growth of environment-friendly technology will be beneficial in addressing regional pollution and global climate change issues. Technological innovation and green growth can transform industrial structures from non-renewable energy to renewable energy sources and contribute significantly to the mitigation of pollution emissions. Furthermore, for the successful implementation of these policies, human capital development is needed. Enhancing the skills of human capital through education can generate awareness among people regarding environment-friendly technologies.
Our study contains several limitations. This study is ignoring other polluted economies and other green growth variables in empirical analysis. Other green growth variables such as green investment, green innovation, financial inclusion, and trade can also be explored. The objectives of our research can be replicated for other regions and countries also. Future studies can also investigate the impact of fiscal spending on other determinants of green growth such as green innovation and green investment. The monetary sector's role can also be explored on green growth.