, but cannot regulate how this expenditure is subdivided among the commodities within a subset. We say that preferences are … in the partition depends on the effort level, and that preferences are weakly separable when there exists no such subset … insurance and preferences are nonseparable. This result appears to support the conclusion of the above mentioned folk theorem …

We study a general equilibrium model where agents' preferences, productivity and labour endowments depend on their … preferences and health enhancing consumption activities are sufficiently effective, so that income and health are substitutes. The … converse obtains when health aspects preferences, but health enhancing consumption activities are not very effective, and hence …

-one European airports over an eighteen-year period. We are able to extend the literature on the role of airports as an essential … main empirical results indicate that aeronautical charges are lower at airports when single-till regulation is employed …, when airports are privatized, and -- tentatively -- when ex-post price regulation is applied. Furthermore, hub airports …

joint ownership of airports? Does airline countervailing power stop airports raising fees? Should airports be prohibited, as … upstream concentration or in the substitutability between airports always increases the landing fee; (b) the effect of … regime between airlines and whether airports can price discriminate: airline concentration reduces the landing fee when …