Estimation, Inference, and Empirical Analysis for Time-Varying VAR Models

Jiti Gao, Bin Peng and Yayi Yan

Journal of Business & Economic Statistics, 2024, vol. 42, issue 1, 310-321

Abstract: Vector autoregressive (VAR) models are widely used in practical studies, for example, forecasting, modeling policy transmission mechanism, and measuring connection of economic agents. To better capture the dynamics, this article introduces a new class of time-varying VAR models in which the coefficients and covariance matrix of the error innovations are allowed to change smoothly over time. Accordingly, we establish a set of asymptotic properties including the impulse response analyses subject to structural VAR identification conditions, an information criterion to select the optimal lag, and a Wald-type test to determine the constant coefficients. Simulation studies are conducted to evaluate the theoretical findings. Finally, we demonstrate the empirical relevance and usefulness of the proposed methods through an application on U.S. government spending multipliers.

Date: 2024
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DOI: 10.1080/07350015.2023.2191673

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