STATIONARITY CONDITION FOR AR INDEX PROCESS

Eric Iksoon Im, David L. Hammes and Douglas T. Wills

Econometric Theory, 2006, vol. 22, issue 01, pages 164-168

Abstract: The stationarity conditions for an autoregressive (AR) process in general are reduced to a remarkably simple inequality if the lag coefficients are restricted to be identical. The condition is not only analytically elegant but also applicable in checking the validity of the stationarity conditions for such a restricted AR process of any order.We are deeply indebted to Professor Paolo Paruolo, NP co-editor of Econometric Theory, and anonymous referees for constructive comments and suggestions that led to significant improvements. Errors, if any, are solely ours.

Date: 2006

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