It is known that radial collapse around density peaks can explain the
key features of the evolution of a correlation function in gravitation
al clustering in thr ee dimensions. The same model also makes specific
predictions for two dimensions. In this paper we test these predictio
ns in two dimensions with the help of N-body simulations. We find that
there is no stable clustering in the extremely nonlinear regime, but
a nonlinear scaling relation does exist and can be used to relate the
linear and the nonlinear correlation function. In the intermediate reg
ime, the simulations agree with the model.