Constructing Optimal Tests on a Lagged Dependent Variable
AbstractVia the leading unit root case, the problem of testing on a lagged dependent variable is characterized by a nuisance parameter which is present only under the alternative (see Andrews and Ploberger (1994)). This has proven a barrier to the construction of optimal tests. Moreover, in their absence it is impossible to objectively assess the absolute power properties of existing tests. Indeed, feasible tests based upon the optimality criteria used here are found to have numerically superior power properties to both the original Dickey and Fuller (1981) statistics and the efficient detrended versions suggested by Elliott, Rothenberg and Stock (1996) and analysed in Burridge and Taylor (2000).
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Bibliographic InfoPaper provided by Department of Economics, University of York in its series Discussion Papers with number 06/19.
Date of creation: Oct 2006
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Nuisance parameter; invariant test; unit root;
This paper has been announced in the following NEP Reports:
- NEP-ALL-2006-10-14 (All new papers)
- NEP-ECM-2006-10-14 (Econometrics)
- NEP-ETS-2006-10-14 (Econometric Time Series)
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