Risk and the Value of Bt Corn
建立概念模型评估Bt玉米对风险的影响，强调区分边际与总体风险效应，并发现Bt玉米的风险效果取决于技术价格，实证表明不同价格下Bt玉米可能增加或降低风险，甚至提供风险收益。
A conceptual model is developed to evaluate the effect of Bt corn on risk. Results highlight the importance of distinguishing between marginal and aggregate risk effects and demonstrate that the effect of Bt corn on risk depends crucially on the price paid for the technology. Empirical results show that, depending on the price, Bt corn can be marginally risk increasing or decreasing and can either increase or decrease corn acreage. Also, depending on the price, Bt corn can provide a risk benefit to farmers, even when Bt corn is risk increasing.