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Markovian Processes, Two-Sided Autoregressions and Finite-Sample Inference for Stationary and Nonstationary Autoregressive Processes

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Author Info
Jean-Marie Dufour ()
Olivier Torrès

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Abstract

In this paper, we develop finite-sample inference procedures for stationary and nonstationary autoregressive (AR) models. The method is based on special properties of Markov processes and a split-sample technique. The results on Markovian processes (intercalary independence and truncation) only require the existence of conditional densities. They are proved for possibly nonstationary and/or non-Gaussian multivariate Markov processes. In the context of a linear regression model with AR(1) errors, we show how these results can be used to simplify the distributional properties of the model by conditioning a subset of the data on the remaining observations. This transformation leads to a new model which has the form of a two-sided autoregression to which standard classical linear regression inference techniques can be applied. We show how to derive tests and confidence sets for the mean and/or autoregressive parameters of the model. We also develop a test on the order of an autoregression. We show that a combination of subsample-based inferences can improve the performance of the procedure. An application to U.S. domestic investment data illustrates the method.

Dans cet article, nous proposons des procédures d'inférence valides à distance finie pour des modèles autorégressifs (AR) stationnaires et non-stationnaires. La méthode suggérée est fondée sur des propriétés particulières des processus markoviens combinées à une technique de subdivision d'échantillon. Les résultats sur les processus de Markov (indépendance intercalaire, troncature) ne requièrent que l'existence de densités conditionnelles. Nous démontrons les propriétés requises pour des processus markoviens multivariés possiblement non-stationnaires et non-gaussiens. Pour le cas des modèles de régression linéaires avec erreurs autorégressives d'ordre un, nous montrons comment utiliser ces résultats afin de simplifier les propriétés distributionnelles du modèle en considérant la distribution conditionnelle d'une partie des observations étant donné le reste. Cette transformation conduit à un nouveau modèle qui a la forme d'une autorégression bilatérale à laquelle on peut appliquer les techniques usuelles d'analyse des modèles de régression linéaires. Nous montrons comment obtenir des tests et régions de confiance pour la moyenne et les paramètres autorégressifs du modèle. Nous proposons aussi un test pour l'ordre d'une autorégression. Nous montrons qu'une technique de combinaison de tests obtenus à partir de plusieurs sous-échantillons peut améliorer la performance de la procédure. Enfin la méthode est appliquée à un modèle de l'investissement aux États-Unis.

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Paper provided by CIRANO in its series CIRANO Working Papers with number 2000s-17.

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Date of creation: 01 May 2000
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Handle: RePEc:cir:cirwor:2000s-17

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Related research
Keywords: Time series; Markov process; autoregressive process; autocorrelation; dynamic model; distributed-lag model; two-sided autoregression; intercalary independence; exact test; finite-sample test; Ogawara-Hannan; investment; Séries chronologiques; processus de Markov; processus autorégressif; autocorrélation; modèle dynamique; modèle à retards échelonnés; autorégression bilatérale; indépendance intercalaire; test exact; Ogawara-Hannan; investissement;

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Find related papers by JEL classification:
C5 - Mathematical and Quantitative Methods - - Econometric Modeling
C12 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods: General - - - Hypothesis Testing
C22 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Time-Series Models; Dynamic Quantile Regressions
C32 - Mathematical and Quantitative Methods - - Multiple or Simultaneous Equation Models; Multiple Variables - - - Time-Series Models; Dynamic Quantile Regressions
E2 - Macroeconomics and Monetary Economics - - Macroeconomics: Consumption, Saving, Production, Employment, and Investment
E22 - Macroeconomics and Monetary Economics - - Macroeconomics: Consumption, Saving, Production, Employment, and Investment - - - Capital; Investment; Capacity

References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:

  1. Dufour, Jean-Marie & Kiviet, Jan F., 1996. "Exact tests for structural change in first-order dynamic models," Journal of Econometrics, Elsevier, vol. 70(1), pages 39-68, January. [Downloadable!] (restricted)
  2. Kiviet, Jan F. & Dufour, Jean-Marie, 1997. "Exact tests in single equation autoregressive distributed lag models," Journal of Econometrics, Elsevier, vol. 80(2), pages 325-353, October. [Downloadable!] (restricted)
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  3. Savin, N.E., 1984. "Multiple hypothesis testing," Handbook of Econometrics, in: Z. Griliches† & M. D. Intriligator (ed.), Handbook of Econometrics, edition 1, volume 2, chapter 14, pages 827-879 Elsevier. [Downloadable!] (restricted)
  4. N.E. Savin & Allan Wurtz, 1996. "The Effect of Nuisance Parameters on the Power of LM Tests in Logit and Probit Models," Econometrics 9606002, EconWPA. [Downloadable!]
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  5. Craig Burnside & Martin Eichenbaum, 1994. "Small Sample Properties of Generalized Method of Moments Based Wald Tests," NBER Technical Working Papers 0155, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
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  6. Dufour, Jean-Marie, 1989. "Nonlinear Hypotheses, Inequality Restrictions, and Non-nested Hypotheses: Exact Simultaneous Tests in Linear Regressions," Econometrica, Econometric Society, vol. 57(2), pages 335-55, March. [Downloadable!] (restricted)
  7. DeJong, David N. & Nankervis, John C. & Savin, N. E. & Whiteman, Charles H., 1992. "The power problems of unit root test in time series with autoregressive errors," Journal of Econometrics, Elsevier, vol. 53(1-3), pages 323-343. [Downloadable!] (restricted)
  8. Park, Rolla Edward & Mitchell, Bridger M., 1980. "Estimating the autocorrelated error model with trended data," Journal of Econometrics, Elsevier, vol. 13(2), pages 185-201, June. [Downloadable!] (restricted)
  9. Burnside, Craig & Eichenbaum, Martin S, 1996. "Small-Sample Properties of GMM-Based Wald Tests," Journal of Business & Economic Statistics, American Statistical Association, vol. 14(3), pages 294-308, July.
  10. Maasoumi, Esfandiar, 1992. "Fellow's opinion : Rules of thumb and pseudo-science," Journal of Econometrics, Elsevier, vol. 53(1-3), pages 1-4. [Downloadable!] (restricted)
  11. Campbell, Bryan & Dufour, Jean-Marie, 1997. "Exact Nonparametric Tests of Orthogonality and Random Walk in the Presence of a Drift Parameter," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 38(1), pages 151-73, February.
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  12. Miyazaki, Shigetaka & Griffiths, William E., 1984. "The properties of some covariance matrix estimators in linear models with AR(1) errors," Economics Letters, Elsevier, vol. 14(4), pages 351-356. [Downloadable!] (restricted)
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Cited by:
(explanations, Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.)

  1. DUFOUR, Jean-Marie & FARHAT, Abdeljelil, 2001. "Exact Nonparametric Two-Sample Homogeneity Tests for Possibly Discrete Distributions," Cahiers de recherche 2001-23, Universite de Montreal, Departement de sciences economiques. [Downloadable!]
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