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53 Wm. & Mary L. Rev. 1219 (2011-2012)
Explaining the Supreme Court's Shrinking Docket

handle is hein.journals/wmlr53 and id is 1229 raw text is: EXPLAINING THE SUPREME COURT'S SHRINKING
DOCKET
RYAN J. OWENS* & DAVID A. SIMON**
ABSTRACT
In recent years, the United States Supreme Court has decided
fewer cases than at any other time in its recent history. Scholars and
practitioners alike have criticized the drop in the Court's plenary
docket. Some even believe that the Court has reneged on its duty to
clarify and unify the law. A host of studies examine potential reasons
for the Court's change in docket size, but few rely on an empirical
analysis of this change and no study examines the correlation
between ideological homogeneity and docket size.
In a comprehensive study, the authors analyze ideological and
contextual factors to determine the conditions that are most likely to
influence the size of the plenary docket. Drawing on empirical data
from every Supreme Court Term between 1940 and 2008, the authors
find that both ideological and contextual factors have led to the
Court's declining plenary docket. First, a Court composed of Justices
who share largely the same world view is likely to hear forty-two
more cases per Term than an ideologically fractured Court. Second,
internal and external mechanisms, such as membership change and
mandatory jurisdiction, are also important. Congress's decision to
remove much of the Court's mandatory appellate jurisdiction is
associated with the Court deciding roughly fifty-four fewer cases per
* Lyons Family Faculty Scholar & Assistant Professor of Political Science, University
of Wisconsin-Madison. We would like to thank Justice David Stras of the Minnesota Supreme
Court for his assistance with this Article. Justice Stras provided some of the data and
analysis that were later incorporated into this Article with respect to the cert pool and
Congress's elimination of most of the Supreme Court's mandatory appellate jurisdiction in
1988. Although he is not a co-author, we thank Justice Stras for his help during the
formative, planning stages of this Article.
** Fellow, the Project on Law & Mind Sciences, Harvard Law School; Ph.D. Candidate,
University of Cambridge; LL.M., Harvard Law School; J.D., Chicago-Kent College of Law;
B.A., University of Michigan.

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