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. Author manuscript; available in PMC: 2018 Jul 11.
Published in final edited form as: Am Econ Rev. 2018 Jun;108(6):1468–1487. doi: 10.1257/aer.20170765

Figure 4.

Figure 4

Semiparametric fixed-effects regressions

Note: (a) Baltagi-Li (2002) regression of quarterly state-average wage on ln bracero stock, with state and quarter-by-year fixed effects. (b) Baltagi-Li (2002) regression of monthly stock of ln employed domestic seasonal farm workers on ln bracero stock, with state and month-by-year fixed effects. Both are local linear with Epanechnikov kernel, bandwidth 2 log-points. Dashed lines show 95% confidence interval, clustered by state. Real wage is hourly wage deflated to 1965 US$ by Consumer Price Index.