NJAS - Wageningen Journal of Life Sciences · 2016 · 181 citations · 23 references
AgricultureAgricultural EconomicsAgronomyAgricultural DevelopmentCrop ProductionSoil FertilityAgricultural ExtensionAgricultural Production SystemsExtension PolicyFertilizer ManagementSoil Fertility ManagementAgricultural Extension EffectsAgricultural Extension SystemsAgricultural Technology AdoptionCrop Yield EnhancementExtension Impact EvaluationFertilizer Adoption DecisionsSoil Fertilizer Recommendation
Highlights• Agricultural extension variable is endogenous in adoption model.• Access to extension services facilitates adoption of chemical fertilizer in Africa.• Gender inequality hinders chemical fertilizer adoption by women in Ghana.• Facilitation of chemical fertilizer adoption through extension increases rice yield.
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Sample Selection Bias as a Specification Error
James J. Heckman · Econometrica · 1979 · 28.9K citations