From: Immigration and wages: new evidence from the African American Great Migration
 |  |  | 1940–1960 | 1940–1970 | ||||
---|---|---|---|---|---|---|---|---|
Wage sample | Labor supply sample | Â | OLS | IV (Immig. component) | IV (National stock) | OLS | IV (Immig. component) | IV (National stock) |
All | All | log(L) | −0.25 | −0.17 | −0.26 | −0.23 | −0.17 | −0.22 |
 |  |  | (0.06) | (0.05) | (0.05) | (0.04) | (0.03) | (0.04) |
 |  | Black*log(L) | 0.17 | 0.07 | 0.25 | 0.15 | 0.09 | 0.18 |
 |  |  | (0.08) | (0.06) | (0.08) | (0.05) | (0.04) | (0.05) |
 |  | N | 234 | 234 | 234 | 311 | 311 | 311 |
Native | All | log(L) | −0.26 | −0.18 | −0.26 | −0.23 | −0.18 | −0.22 |
 |  |  | (0.06) | (0.05) | (0.05) | (0.04) | (0.03) | (0.04) |
 |  | Black*log(L) | 0.19 | 0.06 | 0.27 | 0.12 | 0.06 | 0.14 |
 |  |  | (0.09) | (0.08) | (0.12) | (0.06) | (0.05) | (0.06) |
 |  | N | 234 | 234 | 234 | 312 | 311 | 312 |