“…These aspects have also been looked at by researchers who have studied whether the determining factors in the composition of boards are related to the basic functions assigned and whether this composition has an impact on the management of the business (see Borlea, Achim, & Mare, 2017;Cavaco et al 2017;Farag & Mallin, 2017;Korent, Dundek, & Calopa 2014;Marinova, KEYWORDS corporate governance; board of directors; size; diversity; independence; cEo power; tobin's Q; Roa Plantenga, & Remery, 2016;Terjesen, Barbosa, & Morais, 2016, among others). However, as will be discussed later, the results obtained in the literature are neither conclusive nor definitive and, accordingly, the contribution of new evidence will improve the state of knowledge concerning the questions raised in this work, that is, whether the composition of the board of directors gives priority to the functions of supervision and/or advice and, moreover, determining if that composition affects the performance of the firm.…”