This paper examines agent discretion that is a result of the structure
of the legislative process. Based on several distributions of lawmaki
ng powers, different games are analyzed in which players decide on reg
ulatory policies. The analysis shows that agent discretion increases a
s lawmaking powers are differentiated and assigned to specialized play
ers. Particularly, monopoly initiation power, which allows a player to
act as a gatekeeper, has a substantial impact on discretion. Agent di
scretion will be even larger when these players also have heterogenous
preferences. The framework that is developed in this paper permits co
mparisons across different political systems with regard to agent disc
retion and legislative control on policymaking.