This article deals with the specification of a locally flexible and theory-consistent system of mixed demand functions, a framework that allows for a rich set of possibilities about what is assumed as exogenous in a demand model. A coherent mixed demand system is derived by using the restricted...

The paper employs a multistage Quadratic Almost Ideal Demand System (QAIDS) with heterogeneous preferences to calculate unconditional elasticities for a complete demand system, and to derive energy and nutrients' elasticities for a number of Italian households. A set of comparative static...