World Development
World Development > 2011 > 39 > 5 > 758-772
World Development > 2013 > 47 > Complete > 121-135
World Development > 2014 > 62 > Complete > 75-87
World Development > 2011 > 39 > 5 > 758-772
World Development > 2013 > 47 > Complete > 121-135
World Development > 2014 > 62 > Complete > 75-87