Vector Autoregressions, Policy Analysis, and Directed Acyclic Graphs: An Application to the U.S. Economy

Titus Awokuse and David Bessler ()

Journal of Applied Economics, 2003, vol. 6, issue 1, 1-24

Abstract: The paper considers the use of directed acyclic graphs (DAGs), and their construction from observational data with PC-algorithm TETRAD II, in providing over-identifying restrictions on the innovations from a vector autoregression. Results from Sims' 1986 model of the US economy are replicated and compared using these data-driven techniques. The directed graph results show Sims' six-variable VAR is not rich enough to provide an unambiguous ordering at usual levels of statistical significance. A significance level in the neighborhood of 30% is required to find a clear structural ordering. Although the DAG results are in agreement with Sims' theory-based model for unemployment, differences are noted for the other five variables: income, money supply, price level, interest rates, and investment. Overall the DAG results are broadly consistent with a monetarist view with adaptive expectations and no hyperinflation.

Date: 2003
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Journal Article: Vector Autoregressions, Policy Analysis, and Directed Acyclic Graphs: An Application to the U.S. Economy (2003)
Journal Article: Vector Autoregressions, Policy Analysis, and Directed Acyclic Graphs: An Application to the U.S. Economy (2003)
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DOI: 10.1080/15140326.2003.12040583

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