Impact of farm subsidies on global agricultural productivity
研究了42个国家超过80%农业产量的长期数据，发现不同补贴工具对生产力增长有异质性影响，其中投入补贴对产出增长和劳动生产率有强正向作用，产出补贴仅对产出增长有较小正向影响。
Abstract The agriculture sector receives substantial fiscal subsidies in various forms, including through programs that are linked to production and others that are decoupled. As the sector has reached the technology frontier in production over the last three decades or so, particularly in high‐ and middle‐income countries, it is intriguing to investigate the impact of subsidies on productivity at aggregate level. This study examines the impact of subsidies on productivity growth in agriculture globally using a long time series on the nominal rate of assistance for 42 countries that covers over 80% of agricultural production. The econometric results show heterogenous effects from various subsidy instruments depending on the choice of productivity measure. Regression results suggest a strong positive effect of input subsidies on both output growth and labor productivity. A positive but relatively small impact of output subsidies is found on output growth only.