The Dramatic Rise in Agricultural Productivity in the U.S During the Twentieth Century: Disentangling the Roles of Technological Change, Government Policy, and Climate.

该奖项资助了一项大规模的工作，旨在收集有关20世纪美国农业生产力决定因素的新数据。pi正在整合来自多个档案来源的信息，汇编一个单一的数据集，其中包括从1879年到2002年每年收集的来自3000多个美国县的数据。利用这些数据，pi研究气候和天气变化对农业生产力的影响。他们还研究了研发支出（在国家、州和地方层面）、更好的农民教育和培训、新技术以及旨在援助农业的政府项目的影响。收集的数据集产生了实质性的更广泛的影响；它们将被一个大型跨学科研究团体使用，因为它们可以用于研究农村地区各种各样的社会经济问题。这些数据还将帮助我们了解和预测气候变化对农业生产力的影响。

This award funds a large scale effort to collect new data about the determinants of agricultural productivity in the United States during the 20th century. The PIs are combining information from several archival sources to compile a single dataset that includes data from over 3000 US counties, collected annually from 1879 to 2002. With these data, the PIs examine the effects of changes in climate and weather on agricultural productivity. They also examine the impact of R&D spending (at the national, state, and local levels), better education and training for farmers, new technologies, and government programs intended to aid agriculture. The data sets collected create substantial broader impact; they will be used by a large interdiscplinary research community because they can be sued to study a wide variety of socio-economic issues in rural areas. The data will also help us to understand and predict the effects of climate change on agricultural productivity.