"With each legislative issue, legislators have to decide whether to delegate decision-making to the executive and/or to expert bodies in order to flesh out the details of this legislation, or, alternatively, to spell out all aspects of this decision in legislation proper. The reasons why to delegate have been of prime interest to political science ... Focusing on the role of the European Parliament the authors explain why the Commission, the Council, and increasingly the Parliament, delegated decision-making to the Commission" (Quoted from site)