“…A similar definition is provided by Duffee (1999) and Amato and Remolona (2003). Others, such as Collin-Dufresne (Collin-Dufresne, Goldstein, & Martin, 2001), do not directly define the term of risk premium, although they use such a definition in their calculations (Carr & Wu, 2016;Corte, Ramadorai, & Sarno, 2016;Du, Hu, & Zhao, 2016).…”