Pitfalls in Bootstrapping Spurious Regression

Peter Phillips

Journal of Quantitative Economics, 2021, vol. 19, issue 1, No 10, 163-217

Abstract: Abstract The bootstrap is shown to be inconsistent in spurious regression. The failure of the bootstrap is spectacular in that the bootstrap effectively turns a spurious regression into a cointegrating regression. In particular, the serial correlation coefficient of the residuals in the bootstrap regression does not converge to unity, so the bootstrap is not even first order consistent. The block bootstrap serial correlation coefficient does converge to unity and is therefore first order consistent, but has a slower rate of convergence and a different limit distribution from that of the sample data serial correlation coefficient. The analysis covers spurious regressions involving both deterministic trends and stochastic trends. Methods are developed for analyzing the asymptotic behavior of bootstrap techniques with nonstationary time series and the results reinforce longstanding warnings about routine use of the bootstrap with dependent data.

Keywords: Asymptotic theory; Bootstrap; Brownian motion; Cointegration; LK representation; Nonstationarity; Residual diagnostics; Unit root; 62M10 (search for similar items in EconPapers)
JEL-codes: C22 (search for similar items in EconPapers)
Date: 2021
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Citations: View citations in EconPapers (1)

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DOI: 10.1007/s40953-021-00268-6

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