Which is the best model that can be used to determine correlation between two random series?

If we had two random time series X[xt1, xt2, ...xtn], Y[yt1,yt2,...ytn], first has influence (correlates) to another, but those are suppressed  with third one Z[zt1,zt2,...ztn].  What is the...

04 April 2015 794 8 View