This paper is a narrow replication of Firpo, Fortin and Lemieux (Unconditional quantile regressions. Econometrica 2009; 77(3): 953-973), who propose a new estimation method, called unconditional quantile regressions. Using their empirical example, we confirm their results for the effects of unionization on US wage inequality during the period 1983-1985 for both conditional and unconditional quantile regressions. In addition, this paper applies the proposed estimation method to another paper by Autor, Katz and Kearney (Trends in US wage inequality: revising the revisionists. Review of Economics and Statistics 2008; 90(2): 300-323). The latter paper looks at measures of wage inequality in the US labor market data over the period 1963-2005.
