The Early Millennium Slowdown: Replicating the Peersman (2005) Results
对Peersman（2005）使用符号约束识别的常数系数向量自回归模型进行了窄复制和宽复制，发现其美国结果在样本期延长至2014年第二季度时依然稳健，但引入时变参数后，不同模型对2001年美国经济放缓中各冲击作用的解释存在差异。
Summary This paper undertakes both a narrow and wide replication of the constant coefficients vector autoregression (VAR) identified with sign restrictions considered by Peersman ( Journal of Applied Econometrics 2005; 20 (2): 185–207. His results for the US are robust to an increase in the sample period from 2002:Q2 to 2014:Q2, but the extension to time‐varying parameters highlights the importance of testing the robustness of results against time variation. In particular, there are differences across models regarding the role of individual shocks during the 2001 US slowdown. Copyright © 2015 John Wiley & Sons, Ltd.