NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

The Role of Discretion in the Criminal Justice System

Daniel P. Kessler, Anne Morrison Piehl

NBER Working Paper No. 6261
Issued in November 1997
NBER Program(s):   LE

Although a substantial body of research suggests that the discretion of discretion of actors in the criminal justice system is important, there is disagreement in the existing empirical literature over its role. Studies in this literature generally hypothesize that discretion plays one of two roles: either it serves as the means by which changing broad social norms against crime causes changes in sentencing patterns, or it serves as the means by which internal social norms of the criminal justice system prevent the implementation of formal changes in laws. We reject both of these hypotheses using data on the sentencing of California prisoners before and after Proposition 8, which provided for sentence enhancements for those convicted of certain serious' crimes with qualifying' criminal histories. We find that an increase in the statutory sentence for a given crime can increase sentence length for those who are charged with the crime, and also for those who are charged with factually 'similar' crimes, where a 'similar' crime is defined as one that has legal elements in common with the given crime. These spillovers are consistent with neither broad social norms nor internal social norms, so we conclude that discretion takes a less-well studied form, which we call 'prosecutorial maximization.'

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Document Object Identifier (DOI): 10.3386/w6261

Published: Journal of Law, Economics, and Organization, Vol. 14, no. 2 (October 1998): 256-276

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