There is considerable evidence of high returns to public investments in agricultural R&D, but because intellectual property in agriculture is considered a public good, little R&D investment by growers themselves. This study investigates the potential for growers to increase commodity sales through product research, development, patenting and promotion in a dynamic commodity-market model. Theoretical hypotheses derived from the solution to this model are tested in an empirical example from Washington apples. Estimation results show that, despite significant spillovers to research and promotion expenditure, growers can improve the effectiveness of generic commodity promotion by funding R&D programs as well.


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