Do Seasonal Adjustments Induce Noncausal Dynamics in Inflation Rates?

This paper investigates the effect of seasonal adjustment filters on the identification of mixed causal-noncausal autoregressive models. By means of Monte Carlo simulations, we find that standard seasonal filters induce spurious autoregressive dynamics on white noise series, a phenomenon already doc...

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Main Authors: Alain Hecq, Sean Telg, Lenard Lieb
Format: Article
Language:English
Published: MDPI AG 2017-10-01
Series:Econometrics
Subjects:
Online Access:https://www.mdpi.com/2225-1146/5/4/48
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author Alain Hecq
Sean Telg
Lenard Lieb
author_facet Alain Hecq
Sean Telg
Lenard Lieb
author_sort Alain Hecq
collection DOAJ
description This paper investigates the effect of seasonal adjustment filters on the identification of mixed causal-noncausal autoregressive models. By means of Monte Carlo simulations, we find that standard seasonal filters induce spurious autoregressive dynamics on white noise series, a phenomenon already documented in the literature. Using a symmetric argument, we show that those filters also generate a spurious noncausal component in the seasonally adjusted series, but preserve (although amplify) the existence of causal and noncausal relationships. This result has has important implications for modelling economic time series driven by expectation relationships. We consider inflation data on the G7 countries to illustrate these results.
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spelling doaj.art-ba73d08027a044beada929004b691d6d2022-12-22T02:53:15ZengMDPI AGEconometrics2225-11462017-10-01544810.3390/econometrics5040048econometrics5040048Do Seasonal Adjustments Induce Noncausal Dynamics in Inflation Rates?Alain Hecq0Sean Telg1Lenard Lieb2Department of Quantitative Economics, Maastricht University, School of Business and Economics, P.O. Box 616, 6200 MD Maastricht, The NetherlandsDepartment of Quantitative Economics, Maastricht University, School of Business and Economics, P.O. Box 616, 6200 MD Maastricht, The NetherlandsDepartment of General Economics (Macro), Maastricht University, School of Business and Economics, P.O. Box 616, 6200 MD Maastricht, The NetherlandsThis paper investigates the effect of seasonal adjustment filters on the identification of mixed causal-noncausal autoregressive models. By means of Monte Carlo simulations, we find that standard seasonal filters induce spurious autoregressive dynamics on white noise series, a phenomenon already documented in the literature. Using a symmetric argument, we show that those filters also generate a spurious noncausal component in the seasonally adjusted series, but preserve (although amplify) the existence of causal and noncausal relationships. This result has has important implications for modelling economic time series driven by expectation relationships. We consider inflation data on the G7 countries to illustrate these results.https://www.mdpi.com/2225-1146/5/4/48inflationseasonal adjustment filtersmixed causal-noncausal models
spellingShingle Alain Hecq
Sean Telg
Lenard Lieb
Do Seasonal Adjustments Induce Noncausal Dynamics in Inflation Rates?
Econometrics
inflation
seasonal adjustment filters
mixed causal-noncausal models
title Do Seasonal Adjustments Induce Noncausal Dynamics in Inflation Rates?
title_full Do Seasonal Adjustments Induce Noncausal Dynamics in Inflation Rates?
title_fullStr Do Seasonal Adjustments Induce Noncausal Dynamics in Inflation Rates?
title_full_unstemmed Do Seasonal Adjustments Induce Noncausal Dynamics in Inflation Rates?
title_short Do Seasonal Adjustments Induce Noncausal Dynamics in Inflation Rates?
title_sort do seasonal adjustments induce noncausal dynamics in inflation rates
topic inflation
seasonal adjustment filters
mixed causal-noncausal models
url https://www.mdpi.com/2225-1146/5/4/48
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AT lenardlieb doseasonaladjustmentsinducenoncausaldynamicsininflationrates