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Long-run restrictions are a very popular method for identifying structural vector autoregressions, but they suffer from weak identification when the data is very persistent, i.e., when the highest autoregressive roots are near unity. Near unit roots introduce additional nuisance parameters and...
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The reliability of traditional asset pricing tests depends on: (1) correlations between asset returns and factors; (2) the time-series sample size T compared to the number of assets N. For macro-risk factors, like consumption growth, (1)-(2) are often such that traditional tests cannot be...
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Mimicking portfolios for factors are often used in asset pricing studies. Current practice has generally ignored the impact of estimation errors on the weights of the mimicking portfolios. We show that such a practice can lead to gross understatement of the standard errors of the estimated risk...
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In contrast with a large body of existing literature, Nekoei and Weber (2017, NW henceforth) find a positive effect of unemployment insurance on job quality. This comment shows that NW's finding is driven by unnecessarily large bandwidths used in their regression discontinuity analysis. When the...
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