The Timing and Pattern of Technological Development in English Agriculture, 1611–1850
基于专利数据梳理了1611-1850年英国农业发明的时序，用市场分析解释发明时机，发现化肥受技术约束、种子条播机和脱粒机受相对成本影响，而专利总量与人口和食品价格相关。
A chronology of invention in farming is given, based on patent data, for England between 1611 and 1850. The chronology is explained using market analysis. Technological constraints determined the timing of some inventions, most notably for fertilizers. Relative input costs explain the early development of the seed drill and the threshing machine. Inventive output also depended on the market for food. The overall level of patents issued was related to the level of population and to changing food prices.The output market for food was influencing invention through of population growth on the advance of farming technology.