The demand function is what the consumer prefers regarding goods and services. Every person has an individual demand for the goods and services available in the market.

The utility function can be used to derive the demand function, and both concepts relate to utility maximization.

For continuous aggregate excess demand functions of economies, the existing literature (e.g. Sonnenschein (1972, 1973), Mantel (1974), Debreu (1974), Mas-Colell (1977), etc.) achieves a complete ...

We consider the design of regulatory policy when the regulator is imperfectly informed about both the firm's cost function and the demand function it faces. To some extent the optimal policy here is ...