  Results on two-particle angular correlations in jet cones and on multiplicity
fluctuations in one- and two- dimensional angular intervals, delivered by three
experiments (DELPHI, L3 and ZEUS, at $\sqrt{s}$ from few to 183 GeV) are
compared to present existing analytical QCD calculations, using the LPHD
hypothesis. Two different types of functions have been tested. While the
differentially normalized correlation functions show substantial deviations
from the predictions, a globally normalized correlation function agrees
surprisingly well. The role of the QCD parameters $\alpha_s$, $\Lambda$ and
$n_f$ is discussed. The necessity to include full energy-momentum conservation
into the analytical calculations is stressed.
