The $l_q$ consistency of the Dantzig Selector for Cox's Proportional Hazards Model

Abstract

The Dantzig selector for the proportional hazards model proposed by D.R. Cox is studied in a high-dimensional and sparse setting. We prove the $l_q$ consistency for all $q\ge 1$ of some estimators based on the compatibility factor, the weak cone invertibility factor, and the restricted eigenvalue for certain deterministic matrix which approximates the Hessian matrix of log partial likelihood. Our matrix conditions for these three factors are weaker than those of previous researches.

13 pages

References in corpus (3)

• Asymptotics for minimisers of convex processes
• The Dantzig selector and sparsity oracle inequalities
• Oracle inequalities for the lasso in the Cox model