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AAE637 Topics for April 22, 2008. Introduction to Sample Selection Models Char. of Bivariate Normal Variables Moments of an “Incidentally Truncated” Normal Random Variable Conditional Values and Marginal Effects Two-Step Estimation ( Heckit )Technique Correct S.E. Calculation in 2 nd Step
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AAE637 Topics for April 22, 2008 • Introduction to Sample Selection Models • Char. of Bivariate Normal Variables • Moments of an “Incidentally Truncated” Normal Random Variable • Conditional Values and Marginal Effects • Two-Step Estimation (Heckit)Technique • Correct S.E. Calculation in 2nd Step • Mroz’s Example of Labor Supply • 2-Step Approach • ML Estimation of the Sample Selection Model • Look at 1stPPT file on deriving the AIDS