Arbeitspapier

LASSO-driven inference in time and space

We consider the estimation and inference in a system of high-dimensional regression equations allowing for temporal and cross-sectional dependency in covariates and error processes, covering rather general forms of weak dependence. A sequence of large-scale regressions with LASSO is applied to reduce the dimensionality, and an overall penalty level is carefully chosen by a block multiplier bootstrap procedure to account for multiplicity of the equations and dependencies in the data. Correspondingly, oracle properties with a jointly selected tuning parameter are derived. We further provide high-quality de-biased simultaneous inference on the many target parameters of the system. We provide bootstrap consistency results of the test procedure, which are based on a general Bahadur representation for the Z-estimators with dependent data. Simulations demonstrate good performance of the proposed inference procedure. Finally, we apply the method to quantify spillover effects of textual sentiment indices in a financial market and to test the connectedness among sectors.

Language
Englisch

Bibliographic citation
Series: cemmap working paper ; No. CWP36/18

Classification
Wirtschaft
Hypothesis Testing: General
Single Equation Models; Single Variables: Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models; Diffusion Processes
Model Construction and Estimation
Forecasting Models; Simulation Methods
Subject
LASSO
time series
simultaneous inference
system of equations
Z-estimation
Bahadur representation
martingale decomposition

Event
Geistige Schöpfung
(who)
Chernozhukov, Victor
Härdle, Wolfgang
Huang, Chen
Wang, Weining
Event
Veröffentlichung
(who)
Centre for Microdata Methods and Practice (cemmap)
(where)
London
(when)
2018

DOI
doi:10.1920/wp.cem.2018.3618
Handle
Last update
10.03.2025, 11:42 AM CET

Data provider

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Object type

  • Arbeitspapier

Associated

  • Chernozhukov, Victor
  • Härdle, Wolfgang
  • Huang, Chen
  • Wang, Weining
  • Centre for Microdata Methods and Practice (cemmap)

Time of origin

  • 2018

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