no code implementations • 22 Mar 2023 • Weichuan Deng, Pawel Polak, Abolfazl Safikhani, Ronakdilip Shah
We introduce a unified framework for rapid, large-scale portfolio optimization that incorporates both shrinkage and regularization techniques.
no code implementations • 20 Oct 2022 • Mingliang Ma, Abolfazl Safikhani
Despite the widespread use of neural networks in such settings, most theoretical developments of deep neural networks are under the assumption of independent observations, and theoretical results for temporally dependent observations are scarce.
no code implementations • 14 Oct 2022 • Xiudi Li, Abolfazl Safikhani, Ali Shojaie
To overcome these challenges, in this paper we propose an approximate EM algorithm for Markov-switching VAR models that leads to efficient computation and also facilitates the investigation of asymptotic properties of the resulting parameter estimates.
no code implementations • 3 Jul 2020 • Abhishek Kaul, Stergios B. Fotopoulos, Venkata K. Jandhyala, Abolfazl Safikhani
We study a plug in least squares estimator for the change point parameter where change is in the mean of a high dimensional random vector under subgaussian or subexponential distributions.