New results on mixture and exponential models by Orlicz spaces
  New results and improvements in the study of nonparametric exponential and mixture models are proposed. In particular, different equivalent characterizations of maximal exponential models, in terms of open exponential arcs and Orlicz spaces, are given. Our theoretical results are supported by several examples and counterexamples and provide an answer to some open questions in the literature. 
Marina Santacroce, Paola Siri, Barbara Trivellato
math.ST stat.TH