This paper describes a weekly economic index (WEI) developed to track the rapid economic developments associated with the onset of and policy response to the novel coronavirus in the United States. The WEI, with its ten component series, tracks the overall economy. Comparing the contributions of...

This chapter reviews inference about large autoregressive or moving average roots in univariate time series, and structural change in multivariate time series regression. The “problem” of unit roots is cast more broadly as determining the order of integration of a series; estimation,...

This paper describes a weekly economic index (WEI) developed to track the rapid economic developments associated with the onset of and policy response to the novel coronavirus in the United States. The WEI is a weekly composite index of real economic activity, with eight of ten series available...