Abstract
We consider selecting a regression model, using a variant of the general-to-specific algorithm in PcGets, when there are more variables than observations. We look at the special case where the variables are single impulse dummies, one defined for each observation. We show that this setting is unproblematic if tackled appropriately, and obtain the asymptotic distribution of the mean and variance in a location-scale model, under the null that no impulses matter. Monte Carlo simulations confirm the null distributions and suggest extensions to highly non-normal cases.
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An erratum to this article can be found at http://dx.doi.org/10.1007/s00180-008-0112-1
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Santos, C., Hendry, D.F. & Johansen, S. Automatic selection of indicators in a fully saturated regression. Computational Statistics 23, 317–335 (2008). https://doi.org/10.1007/s00180-007-0054-z
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DOI: https://doi.org/10.1007/s00180-007-0054-z