Richard Gunther and Anthony Mughan , " Political Institutions and 303 - Cleavage Management , " R . Kent Weaver and Bert A . Rockman eds . , Do Institutions Matter ( Washington : Brookings Institution , 1993 ) , pp . 272 - 301 ; Arend Lijphart , Ronald Rogowski and R . Kent Weaver , " Separation of Powers and Cleavage Management , " Weaver and Rockman ( 1993 ) , pp . 303 - 308 .