Arbeitspapier

A near optimal test for structural breaks when forecasting under square error loss

We propose a near optimal test for structural breaks of unknown timing when the purpose of the analysis is to obtain accurate forecasts under square error loss. A bias-variance trade-off exists under square forecast error loss, which implies that small structural breaks should be ignored. We study critical break sizes, assess the relevance of the break location, and provide a test to determine whether modeling a break will improve forecast accuracy. Asymptotic critical values and near optimality properties are established allowing for a break under the null, where the critical break size varies with the break location. The results are extended to a class of shrinkage forecasts with our test statistic as shrinkage constant. Empirical results on a large number of macroeconomic time series show that structural breaks that are relevant for forecasting occur much less frequently than indicated by existing tests.

Language
Englisch

Bibliographic citation
Series: Tinbergen Institute Discussion Paper ; No. 17-039/III

Classification
Wirtschaft
Hypothesis Testing: General
Forecasting Models; Simulation Methods
Subject
structural break test
forecasting
squared error loss

Event
Geistige Schöpfung
(who)
Boot, Tom
Pick, Andreas
Event
Veröffentlichung
(who)
Tinbergen Institute
(where)
Amsterdam and Rotterdam
(when)
2017

Handle
Last update
10.03.2025, 11:43 AM CET

Data provider

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Object type

  • Arbeitspapier

Associated

  • Boot, Tom
  • Pick, Andreas
  • Tinbergen Institute

Time of origin

  • 2017

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