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For the fourth cours on Inequalities, we will get back on the quantile regression, and discuss welfare functions as well as poverty indices. Slides are now onlineTo illustrate, we will use the following datasetsuk88 &#60;- read.csv("http://www.vcharite.univ-mrs.fr/pp/lubrano/cours/fes88.csv",sep=";",header=FALSE)$V1uk92 &#60;- read.csv("http://www.vcharite.univ-mrs.fr/pp/lubrano/cours/fes92.csv",sep=";",header=FALSE)$V1uk96 &#60;- read.csv("http://www.vcharite.univ-mrs.fr/pp/lubrano/cours/fes96.csv",sep=";",header=FALSE)$V1cpi &#60;- c(421.7, 546.4, 602.4)y88 &#60;- uk88/cpi[1]y92 &#60;- uk92/cpi[2]y96 &#60;- uk96/cpi[3]and for the part on applications of quantile regressionsalary &#60;- read.table("http://data.princeton.edu/wws509/datasets/salary.dat",header=TRUE)