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Cross-validation for selecting a model selection procedure
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DOI：10.1016/j.jeconom.2015.02.006.png)
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摘要
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While there are various model selection methods, an unanswered but important question is how to select one of them for data at hand. The difficulty is due to that the targeted behaviors of the model selection procedures depend heavily on uncheckable or difficult-to-check assumptions on the data generating process. Fortunately, cross-validation (CV) provides a general tool to solve this problem. In this work, results are provided on how to apply CV to consistently choose the best method, yielding new insights and guidance for potentially vast amount of application. In addition, we address several seemingly widely spread misconceptions on CV. (C) 2015 Elsevier B.V. All rights reserved.
Keyword:
Cross-validation
Cross-validation paradox
Data splitting ratio
Adaptive procedure selection
Information criterion
LASSO
MCP
SCAD
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