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LUIGI AUGUGLIARO

A New Penalized Estimator for Sparse Inference in Gaussian Graphical Models: An Adaptive Non-Convex Approach

  • Authors: Daniele Cuntrera; Vito Muggeo; Luigi Augugliaro
  • Publication year: 2023
  • Type: Contributo in atti di convegno pubblicato in volume
  • OA Link: http://hdl.handle.net/10447/623773

Abstract

A new penalized estimator for sparse inference in Gaussian Graphical Models is proposed in this paper. It is based on the adaptive non-convex penalty function first presented in (4). In comparison to other estimators based on non-convex penalty functions, such as SCAD and MCP, the proposed estimator has a number of advantages because it allows controlling the degree of the non-convexity of the objective function through a second tuning parameter, which eliminates the inferential issues associated with the existence of multiple local minima. A simulation study is used to assess the proposed estimator's performance.