Archive for tensor
matrix multiplication [cover]
Posted in Books, pictures, Statistics, University life with tags algorithms, AlphaTensor, cover, deep learning, deep neural network, DeepMind, Google, London, matrix algebra, matrix multiplication, Monte Carlo algorithm, Nature, reinforcement learning, tensor, UK on December 15, 2022 by xi'an
Roberto Casarin in Warwick [joint Stats/Econometrics seminar series]
Posted in Statistics with tags autoregressive model, Bayesian econometrics, Coventry, MCMC, PARAFAC, tensor, UK, University of Warwick on February 11, 2020 by xi'an
My friend, coauthor and former student Roberto Casarin (da Ca’Foscari Venezia) is giving a talk tomorrow in Warwick:
Bayesian Dynamic Tensor Regression (joint with Billio, M., Iacopini, M., and Kaufmann, S.)
Tensor-valued data (i.e. multidimensional data) are becoming increasingly available and call for suitable econometric tools. We propose a new dynamic linear regression model for tensor-valued response variables and covariates that encompasses some well-known multivariate models as special cases. We exploit the PARAFAC low-rank decomposition for providing a parsimonious parametrization and to incorporate sparsity effects. Our contribution is twofold: first, we extend multivariate econometric models to account for tensor-valued response and covariates; second, we define a tensor autoregressive process (TAR) and the associated impulse response function for studying shock propagation. Inference is carried out in the Bayesian framework combined with Monte Carlo Markov Chain (MCMC). We apply the TAR model for studying time-varying multilayer economic networks concerning international trade and international capital stocks. We provide an impulse response analysis for assessing propagation of trade and financial shocks across countries, over time and between layers.
The seminar will take place on Thursday Feb. 13 at 14:00 in OC0.01 (Oculus), University of Warwick, Coventry, UK.
Xi'an's Og 