Casual empiricism suggests higher quality is associated with greater variety. However, recent theoretical and empirical research has either not considered this link, or has been unable to establish unambiguous predictions about the relationship between quality and variety. In this paper we...

In this paper we consider a model where a risk-neutral principal devises a contract for a risk neutral agent who can exert effort along different dimensions. On the top of that the agent possesses multidimensional private information about her cost of effort. We show that as long as effort is...

Partial differential equations -- Elements of the theory of the Stochastic processes -- Partial differential equation in the consumer theory -- Partial differential equations in the producer theory -- Partial differential equations and pricing of the financial -- Derivatives -- A theory of...