Abstract
The Hall conductivity in the random phase model of a disordered system is discussed by making use of the theory developed by Matsubara and Kaneyoshi. The ‘arbitrary site’ Hall conductivity in the random phase model is given. The ‘foursite’ Hall effect is studied in particular, since the occurrence in an actual sample of closed paths with different numbers of sites may lead to cancellation effects, as pointed out by Holstein (1973).

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