Multi-industry | Derwall et al. (2005) : Environmental ratings from Innovest (+)8 Yamashita et al. (1999) : Environmental ratings from CEP (+)9 | Aslaksen and Synnestvedt (2003) : (0) Kempf and Osthoff (2007) : KLD social ratings (+) Diltz (1995) : (+): CEP Shalchian et al. (2012) : KLD social ratings. (+) |