This paper discusses estimation of the semilinear model E[y x, z] = x'[beta] + g(z) using series approximations to the unknown function g(z) under much weaker conditions than heretofore given in the literature. In particular, we allow for z being multidimensional and to have a discrete...

Properties of GMM estimators are sensitive to the choice of instrument. Using many instruments leads to high asymptotic asymptotic efficiency but can cause high bias and/or variance in small samples. In this paper we develop and implement asymptotic mean square error (MSE) based criteria for...

The Self-Sufficiency Project (SSP) was a Canadian research and demonstration project that attempted to "make work pay" for long-term income assistance (IA) recipients by supplementing their earnings. The long-term goal of SSP was to get lone parents permanently off IA and into the paid labour...

With the American Time Use Survey of 2003 and 2004 we first examine whether additional market work has neutral impacts on the mix of non-market activities. The estimates indicate that fixed time costs of market work alter patterns of non-market activities, reducing leisure time and mostly...

Measuring market discrimination is extremely difficult except in the increasingly rare case where physical output measures allow direct measurement of productivity. We illustrate this point with evidence on elections to offices of the American Economic Association. Using a new technique to infer...

The Self-Sufficiency Project (SSP) was a Canadian randomized trial in which the program group had 12 months to find full-time employment in order to qualify for a subsidy that roughly doubled their pre-tax earnings for the next three years. We find evidence of significant impacts of SSP on...