Prediction/estimation with simple linear models: Is it really that simple?

Research output: Contribution to journalArticle

26 Scopus citations

Abstract

Consider the simple normal linear regression model for estimation/ prediction at a new design point. When the slope parameter is not obviously nonzero, hypothesis testing and information criteria can be used for identifying the right model. We compare the performances of such methods both theoretically and empirically from different perspectives for more insight. The testing approach at the conventional size of 0.05, in spite of being the "standard approach," performs poorly in estimation. We also found that the frequently told story "the Bayesian information criterion (BIC) is good when the true model is finite-dimensional, and the Akaike information criterion (AIC) is good when the true model is infinite-dimensional" is far from being accurate. In addition, despite some successes in the effort to go beyond the debate between AIC and BIC by adaptive model selection, it turns out that it is not possible to share the pointwise adaptation property of BIC and the minimax-rate adaptation property of AIC by any model selection method. When model selection methods have difficulty in selection, model combining is a better alternative in terms of estimation accuracy.

Original languageEnglish (US)
Pages (from-to)1-36
Number of pages36
JournalEconometric Theory
Volume23
Issue number1
DOIs
StatePublished - Feb 1 2007

Fingerprint Dive into the research topics of 'Prediction/estimation with simple linear models: Is it really that simple?'. Together they form a unique fingerprint.

  • Cite this