World Development
World Development > 2002 > 30 > 2 > 153-163
World Development > 2002 > 30 > 9 > 1477-1495
World Development > 2002 > 30 > 10 > 1697-1712
World Development > 2002 > 30 > 2 > 153-163
World Development > 2002 > 30 > 9 > 1477-1495
World Development > 2002 > 30 > 10 > 1697-1712