The verification of endogeneity is conducted by means of a regression, in reduced form, of these variables for economic growth (see annex A2). In macroeconomics, this specification is used in order to highlight a cause-effect relationship, since the explanatory variables have been lagged and differentiated in order to overcome the endogeneity caused —in this case— by the bidirectionality of the relationship (which has been found to exist in the studies discussed above). The interpretation, after testing for the absence of endogeneity, can be based on the fact that a change in the labour-market feminization variable has a given effect on the rate of economic growth.