Gibson, John; McKenzie, David; Rohorua, Halahingano; … - International Association of Agricultural Economists - IAAE - 2006
more widely studied restrictions on international trade. But estimated gains from migration may be affected by selection … motivation, rather than the act of moving itself. This poster illustrates this selection bias in commonly used statistical … corrections for nonrandom selection. A unique survey conducted by the authors of Tongan migrants in New Zealand, and of non …