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Improved instrumental variables estimation of simultaneous equations under co...
In this paper we develop estimation techniques and a specification test for the validity of instrumental variables allowing for conditionally heteroskedastic disturbances. We... -
Modelling heterogeneity and dynamics in the volatility of individual wages (r...
This paper presents a model for the heterogeneity and dynamics of the conditional mean and conditional variance of individual wages. A bias-corrected likelihood approach, which... -
Dynamic treatment effect analysis of TV effects on child cognitive developmen...
We investigate whether TV watching at ages 6-7 and 8-9 affects cognitive development measured by math and reading scores at ages 8-9, using a rich childhood longitudinal sample...
