Examining Quantity and Quality Effects of Restricting Nitrogen Applications to Feedgrains
研究限制氮肥施用的时机和水平对饲料谷物产量和蛋白质含量的影响，并开发差分系统估算税收或配给政策的社会成本，发现忽略质量效应会导致政策成本估算错误。
Abstract Restricting the timing and level of nitrogen applications has been proposed as a response to nitrate contamination in Nebraska. Agronomic research indicates that reducing available nitrogen reduces both the yield (quantity) and protein content (quality) of feedgrains. A differential system is developed to estimate the social costs of regulation while simultaneously considering both quantity and quality effects of a tax and/or a rationing policy. The results indicate that ignoring the quality effects of a proposed policy can lead to erroneous estimates of changes in factor use, output responses, and the social costs of regulation.