This study examines the linkage between the profitability of firms measured by return on assets (ROA) and environmental performance measured by eco-efficiency and also the impact of a good environmental management system (EMS) on profitability and eco-efficiency of firms.

Private sector initiatives certifying that producers of goods and services adhere to defined environmental process standards are increasingly popular worldwide. According to proponents, they can circumvent chronic barriers to effective public sector environmental regulation in developing countries. But eco-certification programs will have limited effects on producers’ environmental performance if, as one would expect, they select for those already meeting certification standards.