The present study employs 1993 Continuous Sample Survey of the Population data for Trinidad and Tobago to investigate the causes of gender income differentials. The findings suggest that such differentials are not well explained by differences in levels of human capital and other measured factors valued by the labour market. This result is robust to the disaggregation of the data into African, Indian and Other ethnic groups thereby raising the possibility of gender discrimination. African and Indian women's incomes would increase by over 20 per cent with the returns to the measured factors of their male, ethnic counterparts. Women would benefit from having men's industry distribution of jobs, but not men's occupational distribution. African women appear to be significantly more disadvantaged relative to their male counterparts than are Indian or Other women.