Empirical process theory for locally stationary processes

We provide a framework for empirical process theory of locally stationary processes using the functional dependence measure. Our results extend known results for stationary mixing sequences by another common possibility to measure dependence and allow for additional time dependence. We develop maximal inequalities for expectations and provide functional limit theorems and Bernstein-type inequalities. We show their applicability to a variety of situations, for instance we prove the weak functional convergence of the empirical distribution function and uniform convergence rates for kernel density and regression estimation if the observations are locally stationary processes.

[1]  M. Akritas,et al.  Non‐parametric Estimation of the Residual Distribution , 2001 .

[2]  K. Alexander,et al.  Probability Inequalities for Empirical Processes and a Law of the Iterated Logarithm , 1984 .

[3]  An empirical central limit theorem for intermittent maps , 2010 .

[4]  D. Freedman On Tail Probabilities for Martingales , 1975 .

[5]  D. Pollard,et al.  An introduction to functional central limit theorems for dependent stochastic processes , 1994 .

[6]  M. Donsker Justification and Extension of Doob's Heuristic Approach to the Kolmogorov- Smirnov Theorems , 1952 .

[7]  M. A. Arcones,et al.  Central limit theorems for empirical andU-processes of stationary mixing sequences , 1994 .

[8]  E. Rio Processus empiriques absolument réguliers et entropie universelle , 1998 .

[9]  D. Pollard A central limit theorem for empirical processes , 1982, Journal of the Australian Mathematical Society. Series A. Pure Mathematics and Statistics.

[10]  Dag Tjøstheim,et al.  Nonparametric estimation in null recurrent time series , 2001 .

[11]  R. Nickl,et al.  Mathematical Foundations of Infinite-Dimensional Statistical Models , 2015 .

[12]  Aaron D. Wyner,et al.  UNIFORM LARGE DEVIATION PROPERTY OF THE EMPIRICAL PROCESS OF A MARKOV-CHAIN , 1989 .

[13]  Yoichi Nishiyama Weak convergence of some classes of martingales with jumps , 2000 .

[14]  R. Adamczak A tail inequality for suprema of unbounded empirical processes with applications to Markov chains , 2007, 0709.3110.

[15]  W. Wu,et al.  Asymptotic theory for stationary processes , 2011 .

[16]  Shlomo Levental,et al.  Uniform limit theorems for Harris recurrent Markov chains , 1988 .

[17]  B. Hansen UNIFORM CONVERGENCE RATES FOR KERNEL ESTIMATION WITH DEPENDENT DATA , 2008, Econometric Theory.

[18]  R. Burton,et al.  Limit theorems for functionals of mixing processes with applications to U-statistics and dimension estimation , 2001 .

[19]  R. Dudley Central Limit Theorems for Empirical Measures , 1978 .

[20]  Weidong Liu,et al.  Probability and moment inequalities under dependence , 2013 .

[21]  E. Rio The Functional Law of the Iterated Logarithm for Stationary Strongly Mixing Sequences , 1995 .

[22]  L. Truquet A perturbation analysis of Markov chains models with time-varying parameters , 2020 .

[23]  O. Wintenberger,et al.  The tail empirical process of regularly varying functions of geometrically ergodic Markov chains , 2015, Stochastic Processes and their Applications.

[24]  Piotr Fryzlewicz,et al.  Mixing properties of ARCH and time-varying ARCH processes , 2011, 1102.2053.

[25]  M. Ossiander,et al.  A Central Limit Theorem Under Metric Entropy with $L_2$ Bracketing , 1987 .

[26]  Olivier Durieu,et al.  An Empirical Process Central Limit Theorem for Multidimensional Dependent Data , 2011, 1110.0963.

[27]  J. Dedecker,et al.  Maximal Inequalities and Empirical Central Limit Theorems , 2002 .

[28]  V. Borkar White-noise representations in stochastic realization theory , 1993 .

[29]  Eckhard Liebscher,et al.  Strong convergence of sums of α-mixing random variables with applications to density estimation , 1996 .

[30]  P. Massart,et al.  Invariance principles for absolutely regular empirical processes , 1995 .

[31]  A. Mokkadem Mixing properties of ARMA processes , 1988 .

[32]  Michael H. Neumann,et al.  Probability and moment inequalities for sums of weakly dependent random variables, with applications , 2007 .

[33]  Wei Biao Wu,et al.  EMPIRICAL PROCESSES OF STATIONARY SEQUENCES , 2008 .

[34]  Herold Dehling,et al.  New techniques for empirical processes of dependent data , 2008 .

[35]  I. Pinelis OPTIMUM BOUNDS FOR THE DISTRIBUTIONS OF MARTINGALES IN BANACH SPACES , 1994, 1208.2200.

[36]  R. M. Dudley,et al.  Weak Convergence of Probabilities on Nonseparable Metric Spaces and Empirical Measures on Euclidean Spaces , 1966 .

[37]  Michael Vogt,et al.  Nonparametric regression for locally stationary time series , 2012, 1302.4198.

[38]  Soumendu Sundar Mukherjee,et al.  Weak convergence and empirical processes , 2019 .

[39]  Clémentine Prieur,et al.  An empirical central limit theorem for dependent sequences , 2007 .

[40]  W. Wu,et al.  Gaussian Approximation for High Dimensional Time Series , 2015, 1508.07036.

[41]  A. W. van der Vaart,et al.  Uniform Central Limit Theorems , 2001 .

[42]  J. D. Samur A regularity condition and a limit theorem for Harris ergodic Markov chains , 2004 .

[43]  Tuan Pham,et al.  Some mixing properties of time series models , 1985 .

[44]  Christian Francq,et al.  MIXING PROPERTIES OF A GENERAL CLASS OF GARCH(1,1) MODELS WITHOUT MOMENT ASSUMPTIONS ON THE OBSERVED PROCESS , 2006, Econometric Theory.

[45]  R. Dahlhaus,et al.  Empirical spectral processes for locally stationary time series , 2009, 0902.1448.

[46]  BOUNDS FOR THE ABSOLUTE REGULARITY COEFFICIENT OF A STATIONARY RENEWAL PROCESS , 1992 .

[47]  D. Tjøstheim,et al.  Estimation in nonlinear regression with Harris recurrent Markov chains , 2016, 1609.04237.

[48]  R. Dahlhaus,et al.  Towards a general theory for nonlinear locally stationary processes , 2017, Bernoulli.

[49]  Bin Yu RATES OF CONVERGENCE FOR EMPIRICAL PROCESSES OF STATIONARY MIXING SEQUENCES , 1994 .

[50]  Emmanuel Rio,et al.  Asymptotic Theory of Weakly Dependent Random Processes , 2017 .

[51]  Siegfried Hörmann,et al.  Asymptotic results for the empirical process of stationary sequences , 2009 .

[52]  W. Wu,et al.  Nonlinear system theory: another look at dependence. , 2005, Proceedings of the National Academy of Sciences of the United States of America.