AbstractIntercountry cross‐section comparison of total productivity in agriculture showed that differences in production efficiency were small relative to differences in labor productivity among countries at a same stage of economic development but very large among different stages of development. Moreover, the large differences in total productivity between the developed and the less developed countries widened further during the past two decades. The results suggest a hypothesis that agriculture in the less developed countries as a whole has not yet entered the phase of “modern economic growth” à la Kuznets.