“…These studies, however, fail to provide clear-cut empirical evidence on whether SRI does yield higher returns after adjusting for risks. Similarly, studies on (b) ratings [46][47][48], and (c) screenings [49] in terms of sustainability, do not seem to provide clear cut evidence in terms of higher returns either. Studies of (d) predictability and determinants of returns and volatility [50,51], highlight the role of various forms of uncertainties related to economic policies; and (e) co-movements of SRI indexes and with conventional indexes across various regions [1,52] have been shown to exist, especially when nonlinearity is taken into account.…”