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Law as a Seamless Web? Comparison of Various Network Representations of the United States Supreme Court Corpus (1791-2005)

Proceedings of the 12th International Conference on Artificial Intelligence and Law (ICAIL 2009)

7 Pages Posted: 16 Jun 2009 Last revised: 3 Jun 2010

Michael James Bommarito II

LexPredict, LLC; Bommarito Consulting, LLC; Chicago-Kent College of Law - Illinois Institute of Technology; Michigan State College of Law

Daniel Martin Katz

Illinois Tech - Chicago Kent College of Law

Jon Zelner

University of Michigan at Ann Arbor - Center for Study of Complex Systems

Date Written: June 14, 2009

Abstract

Citation networks are a cornerstone of network research and have been important to the general development of network theory. Citation data have the advantage of constituting a well-defined set where the nature of nodes and edges is reasonably well specified. Much interesting and important work has been done in this vein, with respect to not only academic but also judicial citation networks. For example, previous scholarship focuses upon broad citation patterns, the evolution of precedent, and time-varying change in the likelihood that communities of cases will be cited. As research of judicial citation and semantic networks transitions from a strict focus on the structural characteristics of these networks to the evolutionary dynamics behind their growth, it becomes even more important to develop theoretically coherent and empirically grounded ideas about the nature of edges and nodes. In this paper, we move in this direction on several fronts. We compare several network representations of the corpus of United States Supreme Court decisions (1791-2005). This corpus is not only of seminal importance, but also represents a highly structured and largely self-contained body of case law. As constructed herein, nodes represent whole cases or individual 'opinion units' within cases. Edges represent either citations or semantic connections. As our broader goal is to better understand American common law development, we are particularly interested in the union, intersect and compliment of these various citation networks as they offer potential insight into the long-standing question of whether 'law is a seamless web'? We believe the characterization of law’s interconnectedness is an empirical question well suited to the tools of computer science and applied graph theory. While much work still remains, the analysis provided herein is designed to advance the broader cause.

Keywords: computational legal studies, computer programming and law, network analysis, judicial citation networks, law as a complex system, evolutionary graph theory, computational linguistics and law, semantic analysis, supreme court citations, evolution of law

JEL Classification: C63, K40, K, D71, D72

Suggested Citation

Bommarito, Michael James and Katz, Daniel Martin and Zelner, Jon, Law as a Seamless Web? Comparison of Various Network Representations of the United States Supreme Court Corpus (1791-2005) (June 14, 2009). Proceedings of the 12th International Conference on Artificial Intelligence and Law (ICAIL 2009). Available at SSRN: https://ssrn.com/abstract=1419525 or http://dx.doi.org/10.2139/ssrn.1419525

Michael James Bommarito II

LexPredict, LLC ( email )

MI
United States

HOME PAGE: http://lexpredict.com

Bommarito Consulting, LLC ( email )

MI 48098
United States

HOME PAGE: http://bommaritollc.com

Chicago-Kent College of Law - Illinois Institute of Technology ( email )

565 W. Adams St.
Chicago, IL 60661-3691
United States

Michigan State College of Law ( email )

318 Law College Building
East Lansing, MI 48824-1300
United States

Daniel Martin Katz (Contact Author)

Illinois Tech - Chicago Kent College of Law ( email )

565 W. Adams St.
Chicago, IL 60661-3691
United States

HOME PAGE: http://www.danielmartinkatz.com/

Jon Zelner

University of Michigan at Ann Arbor - Center for Study of Complex Systems ( email )

321A West Hall
Ann Arbor, MI 48109
United States

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