Variables for increases in labour intensity, wages and education gaps are also included, in line with other studies covered in the literature review. Given the endogeneity of the relationship between inequality and growth as outlined in the theoretical framework, these problems are corrected for by lagging the explanatory and dependent variables, as well as by using the differences between the values for previous periods in keeping with the generalized method of moments. It is therefore best to include variables that incorporate their previous values, especially in the cases of interest for this analysis.