Assessing the long-term impact of agricultural research on productivity: evidence from France
利用1959-2012年法国数据，通过动态时间序列模型估计农业研究对生产力的长期弹性为0.16，内部收益率22%，并发现弹性在1970年代初下降，同时考虑了研究重点变化的影响。
Abstract This paper analyses the economic impact of agricultural research on productivity in France over the period 1959–2012. Adopting a dynamic time series model, we provide evidence that the impact of French agricultural research is in the range of values estimated for other countries, with the estimated long-run elasticity being 0.16, which corresponds to an internal rate of return of 22%. The estimated elasticity decreases at the beginning of the 1970s. Complementary analyses are developed to take into account the evolution of the priorities of public agricultural research (reorientation towards more fundamental objectives and focus on broader objective than productivity enhancement).