This study investigated the economic impact of gender diversity on Board composition of companies listed on the Nigerian Stock Exchange (NSE). | Gender heterogeneity and financial performance of listed Nigerian companies International Journal of Mechanical Engineering and Technology IJMET Volume 10 Issue 03 March 2019 pp. 1758-1763 Article ID IJMET_10_03_177 Available online at http ijmet JType IJMET amp VType 10 amp IType 3 ISSN Print 0976-6340 and ISSN Online 0976-6359 IAEME Publication Scopus Indexed GENDER HETEROGENEITY AND FINANCIAL PERFORMANCE OF LISTED NIGERIAN COMPANIES Adetula . Owolabi F. Egbide . and Adeyemo K. Department of Accounting Covenant University Canaan land Nigeria ABSTRACT This study investigated the economic impact of gender diversity on Board composition of companies listed on the Nigerian Stock Exchange NSE . Based on the grouping of fifty most capitalized companies on the NSE into companies with no female on board and those with at least one female on the board the firm performance was analyzed with Mann Whitney U -test over a three-year period. We also examined whether there was any significant difference between the performance of boards with only one female and those with more than one female. The results show no significant difference in the performance of both groups. This is due to moderately heterogeneous board composition as a result of few females in top level decision-making. We recommend a policy mandating listed companies to evaluate their employment and selection methods regarding nomination and promotion into boards and management teams. Key words Economic Performance Gender Diversity Nigerian Stock Exchange Cite this Article Adetula . Owolabi F. Egbide . and Adeyemo K. Gender Heterogeneity and Financial Performance of Listed Nigerian Companies International Journal of Mechanical Engineering and Technology 10 3 2019 pp. 1758 1763. http IJMET JType IJMET amp VType 10 amp IType 3 1. INTRODUCTION Nigeria is the most populous country in Africa with one hundred and seventy three million and six hundred people