英文文献：Estimating the Effect of the Chesapeake Bay Program on Application Rates for Enrollment in the Environmental Quality Incentive Program: A Case Study of Pennsylvania-评估切萨皮克湾计划对环境质量奖励计划入学率的影响:一个宾夕法尼亚州的案例研究
英文文献作者：Wright, Christopher
英文文献摘要：
This paper is an evaluation of the Chesapeake Bay Program's (CBP) effect on farmers' willingness to participate in USDA agricultural conservation programs. Willingness to participate is demonstrated by submission of an application for enrollment in a conservation program. The estimation method is propensity score matching. Matching is one method which can be used to estimate treatment effects using observational studies when a control group is not available for purposes of comparing outcomes with treatment and without treatment.

本文评估了切萨皮克湾计划(CBP)对农民参与美国农业部农业保护计划意愿的影响。愿意参与的意愿可以通过提交保护计划的登记申请来证明。估计方法为倾向分数匹配。当没有对照组来比较治疗和不治疗的结果时，匹配是一种通过观察性研究来估计治疗效果的方法。