出版社:Fundação Getulio Vargas, Escola de Pós-Graduação em Economia
摘要:We unify and generalize the existence results in Werner (1987), Dana,
Le Van and Magnien (1999), Allouch, Le Van and Page (2006) and Allouch
and Le Van (2008). We also show that, in terms of weakening the set of
assumptions, we cannot go too far.