McKenzie, David <br/><br/>
How important is selection?: experimental versus non-experimental measures of the income gains from migration 
by David McKenzie, John Gibson and Steven Stillman 
 - Washington, D.C.  World Bank  2006 
 - 47p. 
 - Policy research working paper; 3906 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social mobility --New Zealand<br/>Tongans --New Zealand<br/>Immigrants --New Zealand --Economic conditions