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math.ST2021
Large factor model estimation by nuclear norm plus norm penalization
Matteo Farnè, Angela Montanari
This paper provides a comprehensive estimation framework via nuclear norm plus norm penalization for high-dimensional approximate factor models with a sparse residual covaria…
math.ST2021
An algebraic estimator for large spectral density matrices
Matteo Barigozzi, Matteo Farnè
We propose a new estimator of high-dimensional spectral density matrices, called UNshrunk ALgebraic Spectral Estimator (UNALSE), under the assumption of an underlying low rank plus…