Exploring the widening food gap: an international perspective
利用90个发达国家和发展中国家1961-2012年的面板数据，研究研发和固定资本存量对农业土地生产力的影响，发现两者均有高社会回报，增加投资有助于应对粮食价格上涨。
Using data for a long panel of 90 developed and developing countries, this article explores the effects of research and development (R&D) and fixed capital stock on agricultural land productivity over the period 1961–2012. Instruments are used for R&D to deal with feedback effects and measurement errors. The results show very high social returns to investment in R&D and to fixed capital stock, suggesting that increasing investment in these factors are promising ways of arresting the increasing food prices due to increasing demand for animal protein, population growth, desertification, salinization, soil erosion, climate change, and decreasing growth in land productivity.