Search Results
Working Paper
Max-Share Misidentification
Valid max-share identification requires necessary and sufficient conditions that are hard to satisfy in practice—the target variable's response to the target shock must be (i) orthogonal to its responses to untargeted shocks and (ii) larger than combinations of those responses. We theoretically characterize consequences of local and global violations to these conditions. In practice, the weight max-share places on an identified untargeted shock can be obtained by projecting the response to that shock on the max-share response. Empirically, the TFP news and business cycle shocks identified ...
Working Paper
Estimating Macroeconomic News and Surprise Shocks
The importance of understanding the economic effects of TFP news and surprise shocks is widely recognized in the literature. This paper examines the ability of the state-of-the-art VAR approach in Kurmann and Sims (2021) to identify responses to TFP news shocks and possibly surprise shocks in theory and practice. When applied to data generated from conventional New Keynesian DSGE models with shock processes that match key TFP moments, this estimator tends to be strongly biased, both in the presence of TFP measurement error and in its absence. This bias worsens in realistically small samples, ...
Working Paper
Estimating Macroeconomic News and Surprise Shocks
The importance of understanding the economic effects of TFP news and surprise shocks is widely recognized in the literature. A common VAR approach is to identify responses to TFP news shocks by maximizing the variance share of TFP over a long horizon. Under suitable conditions, this approach also implies an estimate of the surprise shock. We find that these TFP max share estimators tend to be strongly biased when applied to data generated from DSGE models with shock processes that match the TFP moments in the data, both in the presence of TFP measurement error and in its absence. ...