Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 1 of 1
Full-Text Articles in Public Health
Time Spent Exercising And Obesity: An Application Of Lewbel’S Instrumental Variables Method, Charles J. Courtemanche, Joshua C. Pinkston, Jay Stewart
Time Spent Exercising And Obesity: An Application Of Lewbel’S Instrumental Variables Method, Charles J. Courtemanche, Joshua C. Pinkston, Jay Stewart
Institute for the Study of Free Enterprise Working Papers
This paper examines the role physical activity plays in determining body mass using data from the American Time Use Survey. Our work is the first to address the measurement error that arises when time use during a single day—rather than average daily time use over an extended period—is used as an explanatory variable. We show that failing to account for day-to-day variation in activities results in the effects of time use on a typical day being understated. Furthermore, we account for the possibility that physical activity and body mass are jointly determined by implementing Lewbel’s instrumental variables estimator that exploits …