I am an Assistant Professor in the Department of Economics at the Chinese University of Hong Kong. My research interests are Labour, Family, and Health Economics, with an emphasis on empirical application.
Contact: kevin /DOT/ devereux /AT/ cuhk /DOT/ edu /DOT/ hk
Do workers vary in their ability to work with others? I compare a given worker’s productivity in solitary production to their value-added to team production to identify team skills: a worker’s contribution to team production above and beyond that given by general skills. The identifying assumption is that workers use general skills in both production functions, but team skills only in team production. Professional men’s tennis provides a useful setting to compare solo work (singles) to teamwork (doubles). I find that around 50% of variation in team output is explained by team skills. This is robust to a variety of specifications, including nonlinearities in player inputs. Players sort positively-assortatively along both skill dimensions, yielding indirect returns to skills of about half the magnitude of the direct returns.
Identifying the Value of Teamwork: Application to Professional Tennis
Minimum wages decrease employment in competitive markets, but can increase it in monopsonistic markets so long as they do not exceed the marginal product of labour. We find evidence of non-monotonicity both by market structure and minimum wage level. Minimum wage hikes initially increase hours worked for minimum wage workers (MWWs) in high-concentration local labour markets (LLMs), while increasing job loss likelihood for MWWs in low-concentration LLMs. Repeated hikes reverse initial hours gains, and may increase job loss. Non-MWWs show economically negligible responses throughout. Observing minimum wage status allows for both within- and across-market difference-in-difference designs, whose findings provide mutual support. We combine these into a triple-difference specification. Our results help to resolve the lack of consensus around the sign of the minimum wage’s employment effects.
Non-Monotonic Employment Effects by Market Structure and Minimum Wage Level
Kevin Devereux 