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A Stastistical Analysis of Cointegration for I(2) Variables

Published online by Cambridge University Press:  11 February 2009

Søren Johansen
Søren Johansen
Affiliation:
Institute of Mathematical Statistics
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Abstract

This paper discusses inference for I(2) variables in a VAR model. The estimation procedure suggested consists of two reduced rank regressions. The asymptotic distribution of the proposed estimators of the cointegrating coefficients is mixed Gaussian, which implies that asymptotic inference can be conducted using the χ2 distribution. It is shown to what extent inference on the cointegration ranks can be conducted using the tables already prepared for the analysis of cointegration of I(1) variables. New tables are needed for the test statistics to control the size of the tests. This paper contains a multivariate test for the existence of I(2) variables. This test is illustrated using a data set consisting of U.K. and foreign prices and interest rates as well as the exchange rate.

Type
Articles
Information
Econometric Theory , Volume 11 , Issue 1 , February 1995 , pp. 25 - 59
Copyright
Copyright © Cambridge University Press 1995

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