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Structural Sign Patterns and Reduced Form Restrictions

Andrew Buck () and George Lady ()
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George Lady: Department of Economics, Temple University

No 1102, DETU Working Papers from Department of Economics, Temple University

Abstract: This paper reconsiders the degree to which the sign patterns of hypothesized structural arrays limit the possible outcomes for the sign pattern of the corresponding estimated reduced form. To now, the conditions under which any such restrictions would apply were believed to be very narrow, are rarely found to apply, and are virtually never investigated. As a result, current practice does not test the structural hypothesis in terms of the outcome of the estimated reduced orm in terms of permissible reduced form sign patterns alone. This paper shows that such tests are always possible. Namely, that the sign patterns of the hypothesized structural arrays always limit the sign patterns that can be consistently taken on by the estimated reduced form. Given this, it is always possible to falsify a structural hypothesis based only upon the sign pattern proposed. Necessary conditions, algorithmic principles, and examples are provided to illustrate the analytic principle and the means of its application.

Keywords: Qualitative Analysis; Structural Form; Reduced Form; Identification; Model Falsification (search for similar items in EconPapers)
JEL-codes: C15 C18 C51 C52 (search for similar items in EconPapers)
Date: 2011-06
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Downloads: (external link) First version, 2011 (application/pdf)

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Journal Article: Structural sign patterns and reduced form restrictions (2012) Downloads
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