“…For example, some of the studies use such a simple method as the ordinary least-squares (OLS) technique (e.g., see Benet, 1992;Ederington, 1979;Malliaris & Urrutia, 1991). However, others use more complex methods such as the conditional heteroscedastic (ARCH or GARCH) method (e.g., see Baillie & Myers, 1991;Cecchetti, Cumby, & Figlewski, 1988;Sephton, 1993), the random coefficient method (e.g., see Grammatikos & Saunders, 1983), the co-integration method (e.g., see Chou, Fan, & Lee, 1996;Geppert, 1995;Ghosh, 1993;Lien & Luo, 1993), and the co-integration-heteroscedastic method (e.g., see Kroner & Sultan, 1993).…”