Engle-Granger
(1987) t
est whereas Maximum likelihood based tests include
Johansen (1988; 1991) and J
ohansen-Juselius (1990) tests. During this study we
apply Johansen and Juselius test to dete
rmine the presence of cointegrating vectors
in a set of non stationary time series. The null hypothesis is that there is no
cointegration among the series. Vector Autoregressive (VAR) approach is employed
to test multivariate cointegration. This
assumes all the variables in the model are
endogenous. The Johansen and Juselius procedur
e is employed to test for a long run
relationship between the variables. Joha
nsen and Juselius suggest two likelihood
ratio tests for the determination of the number of cointegrated vectors. Maximal
eigenvalue test evaluates the null hypothesis
that there are at most r cointegrating
vectors against the alternative of r + 1 cointegrating vectors. The maximum eigen
value statistic is given by,