2.Interest aggregation-how interests are combined or aggregated, which sounds like political party activity.
3.Political communication-how influence and interests are transmitted to decision makers, a la Lerner.
On the output or policy delivery side there were three more function:
4.กฎ-marking- who makes the rules or laws, which sound like a U.S. –style legislative activity.
5.กฏ-execution-carrying out or administering the laws, which sounds like the U.S. –style executive branch.
6.Rule-adjudication-deciding conflicts over rules or laws, rather like the U.S. –style judicial branch.