Federica Alberti Max Planck Institute of Economics   Kahlaische Str. 10 Jena, Thüringen 07745 Germany   alberti@econ.mpg.de   http://www.econ.mpg.de/english/staff/esi/alberti           JEL Areas: B5 : Current Heterodox Approaches: General D1 : Household Behavior: General