“…SMEs represent 90% and 99% of worldwide (Bakos, Siu, Orengo, & Kasiri, 2020) and EU (Bartolacci, Caputo, & Soverchia, 2019) businesses, respectively, and their peculiarities in terms of structural, social, and functional factors (Russo & Perrini, 2010) make them very different from large firms. Indeed, SMEs are far from being “little big firms” (Tilley, 2000), and their specific characteristics (Dey et al, 2020), such as simpler management schemes, limited financial and human resources, and stronger social relations, may alter the effectiveness of ESG disclosure. We nest inside this debate by arguing that, contrary to large firms, ESG disclosure is bound to increase the SMEs' weighted average cost of capital (WACC).…”