Aggregate wage averages systematically mask the concentrated impact of labor supply shocks on specific subgroups.
Broad labor market statistics conceal localized and group-level wage depression because the negative effects of labor inflows are highly concentrated among close substitutes and low-skilled cohorts.
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It shows that the negligible average impact of immigration on native wages masks significant localized pressure on these two specific substitute groups.
It illustrates how analyzing broad skill groups can cover up real and historic downward wage pressures faced by specific, narrower education segments.
It highlights how broad aggregate averages disguise significant wage depressions that are highly concentrated within narrow skill-cell cohorts.
It explains how uncorrected aggregate wage averages conceal downward pressure because low-wage native exits artificially inflate the measured average.