Identifying the Degree of Collusion Under Proportional Reduction Staff working paper 2017-51 Oleksandr Shcherbakov, Naoki Wakamori Proportional reduction is a common cartel practice in which cartel members reduce their output proportionately. We develop a method to quantify this reduction relative to a benchmark market equilibrium scenario and relate the reduction to the traditional conduct parameter. Content Type(s): Staff research, Staff working papers JEL Code(s): C, C3, C36, D, D2, D22, L, L4, L41 Research Theme(s): Financial markets and funds management, Market structure, Models and tools, Econometric, statistical and computational methods