“…The instruments must be correlated with the endogenous variable that they replace, i.e., with board gender diversity, but not with the error term in the estimation of beta ( Baum et al, 2007 ). The following variables were used as instruments in the study performed ( Valls Martínez and Cruz Rambaud, 2019 ; Valls Martínez et al, 2022b ): (1) a dummy variable based on whether the company applies Gender Diversity Policies on the board (GDP), expecting that, if so, this body will be more gender-diverse; (2) the percentage of Non-Executive Board Members (NEBM), as the more non-executive members there are, the more women could occupy seats on the board; (3) the percentage of Independent Board Members (IBM), since most women on the board tend to belong to the category of independent members; and (4) Executive Member Gender Diversity (EMGD), assuming that, if the company is more inclined to apply gender policies, then these will affect all levels of the organization, from the lowest positions to executive and monitoring positions.…”