Missing Data - Transparencies

Missing Data - Transparencies - Missing Data Lecture for...

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Missing Data Lecture for Economics 245A Douglas G. Steigerwald UC Santa Barbara January 2011
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Sample Selection missing data - falls within the larger topic of sample selection key issue - with sample selection, sample is no longer random Example - Exogenous Selection (selection on an exogenous variable) saving = β 0 + β 1 income + β 2 age + β 3 married + u data: survey of households with age ± 45 selection issue present if we wish to estimate the saving function for all households no selection issue if we wish to estimate the saving function for households with head age ± 45
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Endogenous Selection Example - Endogenous Selection wealth = β 0 + β 1 f pension g + β 2 educ + β 3 age + u f pension g = 1 if eligible for pension plan data: individuals with wealth ± 200 , 000 endogenous selection ! inconsistency
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Imbens and Wooldridge 2007 Regression y t = x 0 t β + u t x t ( 1 ± K ) possibly endogenous z t ( 1 ± L ) instruments L ² K (assume L = K ) ˆ β IV ³ ˆ β ˆ β = n t = 1 z t x 0 t ! ´ 1
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This note was uploaded on 12/26/2011 for the course ECON 245a taught by Professor Staff during the Fall '08 term at UCSB.

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Missing Data - Transparencies - Missing Data Lecture for...

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