Resumen
AbstractThis paper seeks to provide a better understanding of what makes boards effective. We analyse the relationships between board demography and company performance and between working structures and board tasks in small and medium-sized enterprises (SMEs). We test our hypotheses on a sample of 307 Spanish SMEs. The main empirical result is the negative impact that the proportion of outside directors and the board size have on firm performance. We also find a negative impact of outsiders? presence and a positive impact of director tenure on the board?s service role. Our analysis of the role of board control highlights the negative relationship between this variable and CEO tenure.