Spurious predictions with random time series: The Lasso in the context   of paleoclimatic reconstructions. Discussion of: A statistical analysis of   multiple temperature proxies: Are reconstructions of surface temperatures   over the last 1000 years reliable?
  Discussion of "A statistical analysis of multiple temperature proxies: Are reconstructions of surface temperatures over the last 1000 years reliable?" by B.B. McShane and A.J. Wyner [arXiv:1104.4002] 
Martin P. Tingley
stat.AP