@inbook {31317,
	title = {A Differential Approach to Expected Utility Maximizing Mechanisms},
	booktitle = {Aggregation and Revelation of Preferences},
	year = {1979},
	publisher = {North Holland},
	organization = {North Holland},
	address = {289-308},
	author = {Eric Maskin and J. J. Laffont and J. J. Laffont}
}
