  Within a Monte Carlo simulation we investigate the statistical properties of
an electron flow injected with a Poissonian distribution and transmitted under
ballistic regime in the presence of long-range Coulomb interaction. Electrons
are shown to exhibit a motional squeezing which tends to space them more
regularly rather than strictly at random, and evidence a sub-Poissonian
statistics with a substantially reduced Fano factor $F_n\ll 1$. The temporal
(anti)correlation among carriers is demonstrated to be a collective effect
which persists over the transit of several successive electrons and results in
a considerable (more than one order of magnitude) shot noise suppression.
