Several studies have investigated whether there is a relationship between diversity on a company's board of directors and its performance. The diversity considered has been mainly gender and ethnicity, with a few studies also investigating that of education and age. The results obtained varied, with some studies finding no relationships and others finding positive or negative ones. This study will focus on the Italian region of Piedmont, which is characterized by the presence of hi-tech and low-tech firms (such as wineries) and aims to investigate and verify the existence of a link between gender and ethnic diversity and firm performance in terms of ROA and ROE.