Do phase transitions survive binomial reducibility and thermal scaling?
  First order phase transitions are described in terms of the microcanonical and canonical ensemble, with special attention to finite size effects. Difficulties in interpreting a "caloric curve" are discussed. A robust parameter indicating phase coexistence (univariance) or single phase (bivariance) is extracted for charge distributions. 
L.G. Moretto, L. Phair, G.J. Wozniak (Lawrence Berkeley National   Laboratory)