The institutionalist model has experienced a resurrection, of a sort, that might best be described as neo-institutionalism, and it rests on a considerably more sophisticated analytical plane. There are a number of contributors to this stream, although Theodore J. Lowi has done much of its groundbreaking thinking. Neo-institutionalism is an attempt to categorize public policies according to policymaking subsystems. For example, Lowi classifies policies by four “arenas of power”: redistributive, distributive, constituent, and regulative.