“…Two novel advocates of this approach are John Keane (1988aKeane ( , 1988c and Ralf Dahrendorf (1990Dahrendorf ( , 1991. Other authors referring to this generalized type of model are usually much less detailed about it (see Ding, 1994;Eyal -Townsley, 1995;Goldstein, 1995;Joppke, 1994;Kolankiewicz, 1994;Krygier, 1990;Lengyel, 1987;Ronning, 1995;Schopflin, 1991;Stewart, 1990;Yanqi Tong, 1994;Y. Tong, 1995;White, 1993;Williams -Reuten, 1993).…”