The Identification of Preferences from Equilibrium Prices under Uncertainty. - Felix Kübler; Pierre-Andre Chiappori; Ivar Ekeland; Heracles M. Polemarchakis (J. Econ. Theory, 2002)

The micro economics of group behavior: General characterization. - Pierre-Andre Chiappori; Ivar Ekeland (J. Econ. Theory, 2006)

The Economics and Mathematics of Aggregation: Formal Models of Efficient Group Behavior. - Pierre-Andre Chiappori; Ivar Ekeland (Found. Trends Microeconomics, 2009)

Testable implications of transferable utility. - Pierre-Andre Chiappori (J. Econ. Theory, 2010)