World Development
World Development > 2011 > 39 > 12 > 2105-2118
World Development > 2011 > 39 > 12 > 2091-2104
World Development > 2011 > 39 > 12 > 2221-2231
World Development > 2011 > 39 > 12 > 2199-2210
World Development > 2011 > 39 > 12 > 2211-2220