publications

2021

1. J Econom

   A wavelet method for panel models with jump discontinuities in the parameters

   Bada, O., Kneip, A., Liebl, D., Mensinger, T., Gualtieri, J., and Sickles, R.C.

   Journal of Econometrics 2021

   Abstract Bib View PDF

   While a substantial literature on structural break change point analysis exists for univariate time series, research on large panel data models has not been as extensive. In this paper, a novel method for estimating panel models with multiple structural changes is proposed. The breaks are allowed to occur at unknown points in time and may affect the multivariate slope parameters individually. Our method adapts Haar wavelets to the structure of the observed variables in order to detect the change points of the parameters consistently. We also develop methods to address endogenous regressors within our modeling framework. The asymptotic property of our estimator is established. In our application, we examine the impact of algorithmic trading on standard measures of market quality such as liquidity and volatility over a time period that covers the financial meltdown that began in 2007. We are able to detect jumps in regression slope parameters automatically without using ad-hoc subsample selection criteria.

   @article{bada2021,
     title = {A wavelet method for panel models with jump discontinuities in the
                parameters},
     journal = {Journal of Econometrics},
     year = {2021},
     issn = {0304-4076},
     doi = {https://doi.org/10.1016/j.jeconom.2021.09.006},
     url = {https://www.sciencedirect.com/science/article/pii/S0304407621002189},
     html = {https://www.sciencedirect.com/science/article/abs/pii/S0304407621002189},
     author = {Bada, O. and Kneip, A. and Liebl, D. and Mensinger, T. and Gualtieri, J. and Sickles, R.C.},
     keywords = {Haar wavelets, Adaptive lasso, Panel data, Structural change, Penalized
                   IV, Algorithmic trading, Market efficiency},
     selected = {true},
     bibtex_show = {true},
     abbr = {J Econom}
   }