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A Conditional Probability Analysis of Pattern-Based Models Applied to Event Data in the Israeli-Palestinian Conflict

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Abstract:

Existing formal models of political behavior have followed the lead of the natural sciences and generally focused on methods that use continuous-variable mathematics. Stephen Wolfram has recently produced an extended critique of that approach in the natural sciences, and suggested that a great deal of natural behavior can be accounted for using rules that involve discrete patterns. Over the past three years we have developed software to display the presence of patterns in event data. This paper extends our earlier work, which focused on the presence of specific patterns over time, to look at the stochastic characteristics of these pattern. We are specifically interested in the relationship between patterns as reflected in their conditional probabilities: does the probability of a pattern increase or decrease the probability of other patterns? Using data from the Israeli-Palestinian conflict for the period April 1979 to October 2005, and using some of the common patterns that we identified in our earlier research, we find that these conditional relationship do hold, and are almost always positive. As we expected, and consistent with our earlier studies, the strength of the relationships varies over time and these variations are usually strongly correlated with the broader qualitative characteristics of the conflict, for example major conflict phases such as the first and second intifadas and the Oslo negotiation process.

Most Common Document Word Stems:

may (255), pattern (120), conflict (109), probabl (98), event (93), rule (83), data (73), period (70), tft (65), differ (62), cooper (62), condit (60), behavior (58), use (52), palestinian (51), two (45), schrodt (43), oliv (43), y (40), verbal (39), general (39),

Author's Keywords:

Israel, Palestine, event data, data analysis, time series, TABARI
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Name: American Political Science Association
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Schrodt, Philip. and Hudson, Valerie. "A Conditional Probability Analysis of Pattern-Based Models Applied to Event Data in the Israeli-Palestinian Conflict" Paper presented at the annual meeting of the American Political Science Association, Marriott, Loews Philadelphia, and the Pennsylvania Convention Center, Philadelphia, PA, Aug 31, 2006 <Not Available>. 2008-12-11 <http://www.allacademic.com/meta/p151706_index.html>

APA Citation:

Schrodt, P. A. and Hudson, V. , 2006-08-31 "A Conditional Probability Analysis of Pattern-Based Models Applied to Event Data in the Israeli-Palestinian Conflict" Paper presented at the annual meeting of the American Political Science Association, Marriott, Loews Philadelphia, and the Pennsylvania Convention Center, Philadelphia, PA Online <WEBMAIL/PDF>. 2008-12-11 from http://www.allacademic.com/meta/p151706_index.html

Publication Type: Proceeding
Abstract: Existing formal models of political behavior have followed the lead of the natural sciences and generally focused on methods that use continuous-variable mathematics. Stephen Wolfram has recently produced an extended critique of that approach in the natural sciences, and suggested that a great deal of natural behavior can be accounted for using rules that involve discrete patterns. Over the past three years we have developed software to display the presence of patterns in event data. This paper extends our earlier work, which focused on the presence of specific patterns over time, to look at the stochastic characteristics of these pattern. We are specifically interested in the relationship between patterns as reflected in their conditional probabilities: does the probability of a pattern increase or decrease the probability of other patterns? Using data from the Israeli-Palestinian conflict for the period April 1979 to October 2005, and using some of the common patterns that we identified in our earlier research, we find that these conditional relationship do hold, and are almost always positive. As we expected, and consistent with our earlier studies, the strength of the relationships varies over time and these variations are usually strongly correlated with the broader qualitative characteristics of the conflict, for example major conflict phases such as the first and second intifadas and the Oslo negotiation process.

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Document Type: webmail/pdf
Page count: 26
Word count: 11491
Text sample:
A Conditional Probability Analysis of Pattern-Based Models Applied to Event Data in the Israeli-Palestinian Conflict by Philip A. Schrodt University of Kansas Valerie M. Hudson Brigham Young University Version 1.0 27 August 2006 Paper prepared for delivery at the Annual Meeting of the American Political Science Association Philadelphia 31 August-3 September 2006. Authors can be contacted via email at the following addresses: valerie_hudson@byu.edu and schrodt@ku.edu. This research was supported in part by grants from the U.S. National Science Foundation
May-04 -0.2 -0.4 -0.6 -0.8 PSE ISR Figure 8b: Difference between conditional and marginal probabilities for antecedent and consequent in verbal olive branch rule Page 25


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