SSRN Electronic Journal · 2011 · 13 citations · 33 references
Social SciencesBusiness EconomicsEconomicsLabor EconomicsLabor Market AnalysisMicroeconomicsAgency CostsEmploymentPanel Data AnalysisPanel Data MethodsPersonnel EconomicsTemporary Agency WorkAgency Staff UseEndogeneity SpecificationFirm-level CompetitivenessFixed Effects EstimationFixed Effects SpecificationIndividual Fixed EffectsManufacturingSectoral Competitiveness
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Sample Selection Bias as a Specification Error
James J. Heckman · Econometrica · 1979 · 28.9K citations