st: Is it possible to use nharvey with no panel but simple time series?

[alvaro <aa314@cam.ac.uk>]

Dear list,
I wonder whether this test is also available to test if variables x1t 
and x2t in a simple time series could be tested to have common 
trends. In this case, how to define the command? it only allow to 
define one variable, which puzzles me.

Thank you very much,

Alvaro

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