Replication of unconditional Quantile Regressions by Firpo, Fortin and Lemieux (2009)
重复了Firpo等人（2009）提出的无条件分位数回归方法，用1983-1985年美国数据验证了工会化对工资不平等的影响，并将该方法应用于1963-2005年工资不平等趋势研究。
Summary 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. Copyright © 2015 John Wiley & Sons, Ltd.