The Effect of Minimum Wages on Youth Employment in Canada
用加拿大1988-90年面板数据，比较传统方法与仅用低工资工人样本估计最低工资效应，发现后者效应近乎零，但低工资就业历史长的群体存在显著就业减少效应。
Previous U.S. panel estimates of minimum wage effects have been criticized on the grounds that their identification rests on comparisons of "low-wage" and "high-wage" workers. Using Canadian panel data for 1988–90, I compare estimates based on the traditional U.S. methodology with those based on samples of "low-wage" workers exclusively. The results would appear to vindicate the critics: The minimum wage effect from the latter approach is virtually zero. Yet, estimates from different subgroups of low-wage workers indicate that there is a significant disemployment effect for those with longer low-wage employment histories. This highlights the heterogeneity within low-wage workers and the importance of carefully defining the target group not solely based on workers' wages.