  It has been established in nineteen seventies that in nonequilibrium case the
pair collisions generate non-zero two-particle correlations which are
non-diagonal in momentum space and give the essential contribution to the
current fluctuations of hot electrons. It is shown here that this correlations
give also a contribution to the collision integral, i.e., to kinetic properties
of nonequilibrium gas. The expression for electron energy loss rate P via
phonons is re-derived in detail from this point of view. The contribution of
the non-diagonal part of the nonequilibrium pair correlator to phonon-electron
collision integral and to P is obtained and explicitly calculated in the
electron temperature approximation. It is shown that these results can be
obtained from stochastic non-linear kinetic equation with Langevin fluctuation
force. Such an approach allows to formulate the simple general conditions under
that a contribution of two-particle correlations might be essential in
kinetics. The contribution obtained does not contain the extra powers of small
gas parameter unlike the equilibrium virial decompositions.
