Printing Office -- Deardorff, Allan V. and Robert M. Stern (1986), The Michigan Model of World Production and Trade: Theory and … the World Trade Organization, it is worthwhile to reflect on the WTO's contributions to global welfare since its inception … International Economics 73: 309-332 -- Bagwell, Kyle and Robert W. Staiger (1999), 'An Economic Theory of GATT', American Economic …