Journal of Economics and Business · 2018 · 39 citations · 19 references
Social SciencesEconomicsInnovation ManagementForeign Direct InvestmentIndustrial OrganizationInnovationAgglomeration EconomiesFdi DeterminantsFrontier RegionsIndustrial LocationInternational Innovation StrategyKnowledge SpilloversEfficiency Seeking FdiFirm Productivity SpilloversGeographic Proximity EffectsProximityTechnological Spillovers
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Sample Selection Bias as a Specification Error
James J. Heckman · Econometrica · 1979 · 28.9K citations
Market Structure and Innovation.
P. Lesley Cook, Morton I. Kamien, Nancy L. Schwartz · The Economic Journal · 1982 · 1.5K citations