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Propriétés théoriques et applications en statistique et en simulation de processus et de champs aléatoires stationnaires

Lionel, Truquet (2008) Propriétés théoriques et applications en statistique et en simulation de processus et de champs aléatoires stationnaires. PhD thesis SCIENCES SPÉCIALITÉ MATHÉMATIQUES APPLIQUÉES, CREST Laboratoire de Statistiques , ENSAE p.198.

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Abstract

[1] Bardet, J.-M., Wintenberger, O. (2007) Asymptotic normality of the quasi maximum likelihood

estimator for multidimensional causal processes. Preprint arXiv :0712.0679.

[2] Beran, J., Schützner, M. (2008) Estimation of dependence parameters for linear ARCH processes.

Working document.

[3] Black, F. (1976) Studies in stock price volatility changes. Proceedings of the Business and Economic

Statistics Section, 177-181.

[4] Berkes, I., Horváth, L., Kokoszka, P. S. (2003) GARCH processes : structure and estimation.

Bernoulli 9, 201-227.

[5] Billingsley, P. (1968) Convergence of Probability Measures. John Wiley, New York.

[6] Doukhan, P., Oppenheim, G., Taqqu, M., editors (2003) Theory and Applications of Long-range

Dependence. Birkhaüser, Boston.

[7] Doukhan, P., Teyssière, G., Winant, P. (2006) Vector valued ARCH innity processes. Dependence

in Probability and Statistics. Patrice Bertail, Paul Doukhan and Philippe Soulier Editors,

Springer, New York.

[8] Engle, R. F. (1982) Autoregressive conditional heteroscedasticity with estimates of the variance of

United Kingdom ination. Econometrica 50, 987-1008.

[9] Engle, R. F. (1990) Stock volatility and the crash of ’87. Discussion. The Review of Financial

Studies 3, 103-106.

[10] Francq, C., Zakoïan, J-M. (2004) Maximum Likelihood Estimation of Pure GARCH and ARMAGARCH

Processes. Bernoulli, 10, 605-637.

[11] Francq, C., Makarova, S., Zakoïan, J-M. (2008) A class of stochastic unit-root bilinear processes.

Mixing properties and unit-root test. Forthcoming in the Journal of Econometrics.

[12] Francq, C., Zakoïan, J-M. Inconsistency of the QMLE and asymptotic normality of the weighted

LSE for a class of conditionally heteroscedastic models. Working document. http ://www.eeaesem.

com/les/papers/EEA-ESEM/2008/1099/statbprocesses 7juillet08.pdf

[13] Jeantheau, T. (1998) Strong consistency of estimators for multivariate ARCH models. Econometric

Theory 14-1, 70-86.

[14] Giraitis, L., Robinson, P., Surgailis, D. (2000) A model for long memory conditional heteroscedasticity.

Annals of Applied Probability 10-3, 1002-1024.

[15] Giraitis, L., Leipus, R., Robinson, P., Surgailis, D. (2004) LARCH, Leverage, and Long Memory.

Journal of Financial Econometrics 2-2, 177-210.

[16] Giraitis, L., Surgailis, D. (2002) ARCH-type bilinear models with double long memory. Stochastic

Processes and their Applications 100, 275-300.

[17] Lee, S.-W., Hansen, B. E. (1994) Asymptotic theory for the GARCH(1,1) quasi-maximum likelihood

estimator. Econometric theory 10, 29-52.

[18] Lumsdaine, R. L. (1996) Consistency and asymptotic normality of the quasi-maximum likelihood

estimator in IGARCH(1,1) and covariance stationary GARCH(1,1) models. Econometrica 64,

575-596.

[19] Mikosch, T., Straumann, D. (2006) Quasi-maximum-likelihood estimation in conditionally heteroscedastic

time series : A stochastic recurrence equations approach. Annals of Statistics 34-5,

2449-2495.

[20] Sentana, E. (1995) Quadratic ARCH models. Review of Economic Studies 62, 639-661.

[21] Straumann, D. (2004) Estimation in Conditionally Heteroscedastic Time Series Models. Lecture

Notes in Statistics. Springer Verlag.

[22] Weiss, A. A. (1986) Asymptotic theory for ARCH models : estimation and testing. Econometric

theory 2, 107-131.

Item Type:PhD Thesis (PhD)
PhD Supervisor:Doukhan, Paul and Bardet, Jean-Marc
Date:10 December 2008
Board of examiners:Delyon, Bernard and Kokoszka, Piotr and Shao, Qi-Man and Davydov, Youri and Guyon, Xavier and Latour, Alain and Merlevede, Florence and Zakoian, Jean-Michel
Ecole Doctorale:UNIVERSITÉ PARIS I PANTHÉON-SORBONNE
Discipline:SCIENCES SPÉCIALITÉ MATHÉMATIQUES APPLIQUÉES
Collection (Fonds):ENSAE ParisTech
Institution:ENSAE
Department:CREST Laboratoire de Statistiques
Subjects:1. Mathematics and Applications
Uncontrolled Keywords:Statistiques – Processus stationnaires – Champs aléatoires – Dépendance faible, Statistics – Stationary process – Random fields – Weak dependence
ID Code:5120
Deposited By:Luc Langouet
Deposited On:13 May 2009

Table of content

1 Synthèse des travaux 1

1.1 Dépendance faible des champs aléatoires - 1

1.1.1 Champs aléatoires auto-régressifs - 3

1.1.2 La faible dépendance - 6

1.1.3 Le principe d'invariance fort - 7

1.2 Quelques problèmes d'estimation paramétriques et non paramétriques - 8

1.2.1 Simulation de textures par champs de Markov - 8

1.2.2 Un modèle de type bilinéaire pour des séries à valeurs entières - 13

1.2.3 QMLE lissé et estimation des modèles LARCH - 17

2 A xed point approach to model random elds 23

2.1 Introduction - 23

2.2 Main results - 25

2.2.1 Weak dependence - 25

2.2.2 Random elds with innite interactions - 25

2.2.3 Causality - 28

2.2.4 Simulation of the model - 30

2.3 Examples - 33

2.3.1 Finite interactions random elds - 33

2.3.2 Linear elds - 33

2.3.3 LARCH(1) random elds - 34

2.3.4 Non linear ARCH(1) random elds - 35

2.3.5 Mean eld type model - 35

2.4 Proofs - 36

2.4.1 Proof of lemma 2.1 - 36

2.4.2 Proof of the existence theorem 4.2 - 37

2.4.3 Proof of theorem 2.2 - 37

2.4.4 Proof of proposition 2.1 - 39

2.4.5 General case - 43

2.4.6 Results on causality - 43

2.4.7 Proof of theorem 2.3 - 45

2.4.8 Proof of lemma 2.6 - 46

2.4.9 Proofs for the section 2.3 - 46

3 Weak Dependence, Models and Some Applications 51

3.1 Introduction - 51

3.2 Weak dependence - 52

3.2.1 Independence - 52

3.2.2 Mixing - 52

3.2.3 Denition - 54

3.2.4 Basic examples - 56

3.2.5 Botanic of the models - 56

3.3 Least squares estimation of ARCH(1) processes - 58

3.3.1 Denition, identiability, existence and consistency - 59

3.3.2 Asymptotic normality - 59

3.3.3 Eective estimation procedures - 62

3.4 Random elds - 63

3.4.1 Moment inequalities for partial sums - 64

3.4.2 A central limit theorem for weakly dependent random elds - 69

3.4.3 Donsker invariance principle for random elds - 72

4 Strong invariance principle for a new class of weakly dependent random elds 77

4.1 Introduction - 77

4.2 Covariances estimates for Bernoulli shifts - 79

4.3 Moment inequalities for weakly dependent elds - 82

4.4 The strong invariance principle for spatial Bernoulli shifts - 84

4.5 Proof of Theorem 4:2 - 86

4.5.1 The blocking technique - 86

4.5.2 Approximation of S(Rk) by W(Rk) - 87

4.5.3 The remaining terms - 91

4.5.4 End of the proof of Theorem 4.2 - 92

4.6 Annex - 92

5 A nonparametric resampling for non causal random elds and its application to

the texture synthesis 99

5.1 Introduction - 99

5.2 The Markov Mesh Models algorithm - 101

5.2.1 Principle - 101

5.2.2 Consistency results for causal models - 103

5.2.3 An extension to the noncausal case and a convergence rate of Theorem 5.1 . . . 105

5.3 The approach of Paget and Longsta and simulation examples - 108

5.3.1 Paget and Longsta method - 108

5.3.2 Texture synthesis examples - 110

5.4 Annex - 115

5.5 Some tools for the consistency : Continuity results - 118

6 An integer-valued bilinear type model 129

6.1 Introduction - 129

6.2 The model - 133

6.3 Construction of integer-valued models - 134

6.3.1 Basic properties of signed thinning operators - 134

6.3.2 Bilinear model - 134

6.3.3 INLARCH(1) time series model - 135

6.4 Quasi-maximum likelihood estimator in bilinear model - 135

6.4.1 Estimators denition - 138

6.5 QMLE for GINAR(p) processes - 139

6.6 Extended proofs of the results - 140

6.6.1 Proof of Lemma 6.1 - 140

6.6.2 Proof of Theorem 6.2 - 141

6.6.3 Proof of Lemma 6.2 - 142

6.6.4 Proof of Theorem 6.3 - 143

6.6.5 Proof of Theorem 6.4 - 143

6.6.6 Proof of Theorem 6.1 - 146

7 A new smoothed QMLE for AR processes with LARCH errors 155

7.1 Introduction - 155

7.2 Some general results about LARCH models - 157

7.3 Model specication and smoothed QMLE - 158

7.4 Asymptotics of smoothed QMLE for AR-LARCH models - 161

7.5 Choice of the smoothing parameter h - 162

7.6 Numerical illustration - 166

7.7 Proofs - 173

7.7.1 Proof of Lemma 7.1 - 173

7.7.2 Proof of Lemma 7.2 - 173

7.7.3 Proof of Theorem 7.1 - 174

7.7.4 Proof of Theorem 7.2 - 177

7.7.5 Proof of Lemma 7.3 - 180

7.7.6 Proof of Lemma 7.4 - 182

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