Federal Crop Insurance and the Disincentive to Adapt to Extreme Heat
研究发现，尽管玉米和大豆平均产量提高，但对极端高温的敏感性未变；联邦作物保险补贴增加（从20%升至60%）导致投保作物对极端高温更敏感，因为保险补偿削弱了农民采取适应性措施的激励。
Despite significant progress in average yields, the sensitivity of corn and soybean yields to extreme heat has remained relatively constant over time. We combine county-level corn and soybeans yields in the United States from 1989-2013 with the fraction of the planting area that is insured under the federal crop insurance program, which expanded greatly over this time period as premium subsidies increased from 20 percent to 60 percent. Insured corn and soybeans are significantly more sensitive to extreme heat that uninsured crops. Insured farmers do not have the incentive to engage in costly adaptation as insurance compensates them for potential losses.