| | 1940–1960 | | 1940–1970 |
---|
| | OLS | IV (Immig. component) | | OLS | IV (Immig. component) |
---|
Experience |
\(-\sigma _{x}^{-1}\)
| −0.26 | −0.20 |
\(-\sigma _{x}^{-1}\)
| −0.23 | −0.18 |
| | (0.03) | (0.03) | | (0.04) | (0.03) |
|
N
| 117 | 117 |
N
| 155 | 155 |
Education |
\(-\sigma _{e}^{-1}\)
| −0.24 | −0.28 |
\(-\sigma _{e}^{-1}\)
| −0.21 | −0.25 |
| | (0.14) | (0.06) | | (0.10) | (0.05) |
|
N
| 15 | 15 |
N
| 20 | 20 |
- Notes: “Immig. component” refers to the immigrant component of labor supply and “National stock” refers to the labor supply among all Southern-born workers (including those living in the North). Except where noted, wages and labor supplies are measured using all Northern labor. Standard errors for the estimates of σ
i
, σ
r
, and σ
x
are clustered by education-experience group (or race-education-experience groups for models that pool both races); standard errors for σ
e
are heteroskedasticity-robust. All regressions are weighted by the number of observations used to construct the dependent variable