Empirica · 2013 · 158 citations · 13 references
ManagementInternational BusinessSupply Chain ManagementCompetitive AdvantageExport ManagementLogistics ManagementExport LogisticsExport MarketingFreight ManagementInternational CompetitivenessInternational LogisticsLogistics Performance ManagementExport Competitiveness EffectsExport Logistics Performance MeasurementExport Performance DeterminantsExport TransportationInternational Freight LogisticsLogistics Cost PerformanceLogistics Performance Measurement
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Sample Selection Bias as a Specification Error
James J. Heckman · Econometrica · 1979 · 28.9K citations
A Theoretical Foundation for the Gravity Equation.
James E. Anderson · American Economic Review · 1979 · 3.5K citations