This paper examines how changes in the definition of who is disabled under the Americans with Disabilities Act (ADA) impacts the labor market outcomes of newly covered individuals. Using obese individuals as an example, I exploit variations in coverage of obesity (both by federal circuit and over time) under the ADA to identify the effects of legal changes on employment outcomes of the obese. Previous analyses have exclusively focused on the original version of the ADA, passed in 1990; this analysis is the first to consider the impact of revisions made by Congress in the 2008 amendments to the act. After examining the period between 1988 and 2012, I find that employment outcomes of the obese have improved only when the ADA is enforced on behalf of obese individuals, and all improvement is confined to areas where the enforcement is concentrated. These results suggest that the presence of a disability law is not enough; enforcement of the law is essential to improve employment outcomes of the disabled.
