The Commission stresses, however, that MPs, unlike Presidents, exercise a representative mandate and form part of a collegiate body. Term limits for MPs therefore are not required in order to prevent the equivalent of an unlimited exercise of power by the Executive. There is academic research that supports the idea that term limits for MPs may have a positive effect in terms of avoiding concentrating power in the hands of a few professional politicians and fostering more accurate representation and increased responsiveness of the elected representatives toward the electorate. However, they also weaken the legislature’s power vis-à-vis the executive branch and diminish the legislature’s role, even when both branches are subject to similar limits. They also may increase the influence of party leaderships, as well as of lobby groups and legislative staff, thus contributing to a migration of power from elected representatives to nonelected officials, which risks impacting on voters’ ability to hold representatives accountable.