“…These opportunities include not only PMB, but may also include Question Period, committees, debates, and caucus. Generally speaking, while various researchers have suggested that MPs may affect policy, or at least policy positions, through these arenas (Crimmins and Nesbitt-Larking 1996, Docherty 1997, Howlett 1998, Penner et al 2006, none directly measure influence on actual outputs. As the best example of a systematic study of MP influence in parliament, Kornberg and Mishler (1976) consider a wide range of MP activities that are believed to affect the amount of influence that a given MP holds, yet in that study MPs' perceptions of their colleagues is the study's primary measure of influence.…”