Why do all size distributions look Weibull?


Math model: Smoluchowski coagulation equation

M. v.Smoluchowski, Drei Vortraege ueber Diffusion,
     Brownische Bewegung und Koagulation von Kolloidteilchen.
     Physik. Z., 17:557-585, 1916

D.J.Aldous. Deterministic and stochastic models for coalescensce
     (aggregation, coagulation): a review of mean-field
     theory for probabilists. July 10, 1997
     www.stat.berkeley.edu/users/aldous

      (Thanks to Reka Albert for the reference)