  We investigate the current shot noise at a three terminal node in which one
of the branches contains a noise generating source and the correlations are
measured between the currents flowing through the other two branches.
Interestingly, if the node is macroscopic, the current correlations are
positive, whereas for a quantum coherent mesoscopic node anti-bunching of
electrons leads to negative correlations. We present specific predictions which
permit the experimental investigation of the crossover from quantum mechanical
noise division to macroscopic noise noise division.
