Boustan, Leah Platt. <br/><br/>
Competition in the Promised Land:  Black Migration and Racial Wage Convergence in the North, 1940-1970 / 
Leah Platt Boustan. 
 - Cambridge, Mass.  National Bureau of Economic Research  2008. 
 - 1 online resource:  illustrations (black and white); 
 - NBER working paper series  no. w13813 .
 - Working Paper Series (National Bureau of Economic Research)  no. w13813. .
<br/><br/> February 2008. 
<br/><br/> Four million blacks left the South from 1940 to 1970, doubling the northern black workforce. I exploit variation in migrant flows within skill groups over time to estimate the elasticity of substitution by race. I then use this estimate to calculate counterfactual rates of wage growth. I find that black wages in the North would have been around 7 percent higher in 1970 if not for the migrant influx, while white wages would have remained unchanged. On net, migration was an avenue for black economic advancement, but the migration created both winners and losers. 
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