We consider a budget-constrained mechanism designer who selects an optimal set of projects to maximize her utility. A project's cost is private information and its value for the designer may vary. In this allocation problem, the selection of projects - both which and how many - is endogenously...

The context in which a mechanism is defined and meant to operate plays an important role, and in more than one way. We advocate a contextual approach to mechanism design, that extends to both non-classical aspects of decision and of the physical and information-theoretic environment in which the...