Measuring research benefits in an imperfect market
指出Voon(1994)关于垄断比完全竞争更能带来研究收益的结论是错误的，并基于农业投入品市场的不完全竞争分析，重新审视了研究收益的衡量与分配。
Voon (1994) recently analyzed the benefits of research in an imperfectly competitive market for an agricultural input. Studies of this type are important because the agricultural industries are becoming more concentrated, and agricultural economists have begun to focus more attention on the implications of imperfect competition in the food and fiber sector. The magnitude and distribution of research benefits under alternative market structures are important from both the perspective of agents' incentives to undertake investments in research, and allocating public monies to support research. Voon specifically compared the welfare benefit from a cost-reducing innovation for an agricultural input under conditions of monopoly to perfect competition in the supply of the input. The analysis was based on a framework of linear farm demand for the input and linear and rising marginal cost of supplying the input. The key result, based on simulations of the market equilibrium under alternative demand and cost elasticity configurations, was that research benefits were greater under monopoly than under perfect competition. This result is wrong. Specifically for