Updating and estimating a Social Accounting Matrix using cross entropy methods
AbstractThe problem in estimating a social accounting matrix (SAM) for a recent year is to find an efficient and cost-effective way to incorporate and reconcile information from a variety of sources, including data from prior years. Based on information theory, the paper presents a flexible “cross entropy” (CE) approach to estimating a consistent SAM starting from inconsistent data estimated with error, a common experience in many countries. The method represents an efficient information processing rule—using only and all information available. It allows incorporating errors in variables, inequality constraints, and prior knowledge about any part of the SAM. An example is presented applying the CE approach to data from Mozambique, using a Monte Carlo approach to compare the CE approach to the standard RAS method and to evaluate the gains in precision from utilizing additional information.
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Bibliographic InfoPaper provided by International Food Policy Research Institute (IFPRI) in its series TMD discussion papers with number 58.
Date of creation: 2000
Date of revision:
Social accounting Mathematical models. ; Mozambique. ; Economics Models. ; Entropy (Information theory) ;
Other versions of this item:
- Sherman Robinson & Andrea Cattaneo & Moataz El-Said, 2001. "Updating and Estimating a Social Accounting Matrix Using Cross Entropy Methods," Economic Systems Research, Taylor & Francis Journals, vol. 13(1), pages 47-64.
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