By Rabah Arezki
Agriculture and food markets are plagued with inefficiencies that have dramatic consequences for the welfare of the world’s most vulnerable populations. Globally, farm subsidies amount to over $560 billion a year—equivalent to nearly four times the aid given to developing countries by richer ones. Major emerging-market nations have increased subsidies rapidly, even as rich nations cut theirs drastically. Meanwhile, tariffs on farm products remain a major point of contention in global trade talks.