Explain how interest groups try to directly influence the passage, administration and adjudication of policy. Do not include grassroots lobbying or direct mellowing as part of your answer. As always, cite all relevant authors.

Additional information

This question lies from Political Science and it is about the public policy. Public policy is considered to be an ultimate output of a political system and hence the process of influencing such policy formulation is basic intention of any interest group.

Word limit 390