This paper identifies sharp bounds on the mean treatment response and average treatment effect under the assumptions of both concave monotone treatment response (concave-MTR) and monotone treatment selection (MTS). We use our bounds and the US National Longitudinal Survey of Youth to estimate...

As the return to education (and possibly also parental income) is uncertain, and given that the work a child does covertly for his own parents, and transfers between parents and children, are private information, the government should make school enrollment compulsory, set a legal limit...

This study attempts to examine relative income effects on perceived happiness in three major Asian countries -- China, Japan, and Korea -- in comparison with the United Sates, on the basis of largely comparable nationwide surveys in these countries. Consistent with the results from previous...

The original version of this paper was presented at the conference on the International Social Security Project (Phase VI) organized by the National Bureau of Economic Research (NBER) in Lisbon, Portugal, on May 28-29, 2010. We are grateful for the useful comments from participants at the...