The roam-like-at-home regulation (RLAH) eliminated all mobile roaming surcharges to Eu-ropean consumers travelling … within the European Economic Area (EEA). We measure the causal impact of the regulation on EEA roaming traffic, using the … revenues. To evaluate the welfare effects of the regulation, we develop a framework that includes consumer surplus, retail and …

-patent pharmaceuticals, replacing the existing price cap (PC) regulation. We estimate the effect of the reform using a product level panel … dataset, covering the drugs exposed to RP and a large number of drugs still under PC regulation in the time before and after … regulation in lowering drug prices, while the cross-price effect raises a concern about patent protection …

-of-return regulation is generally thought to result in overinvestment, while incentive regulation is believed to entail underinvestment …. Yet, previous empirical work has generally found that the introduction of incentive regulation has not systematically …-of-return regulation because investment decisions (what can be included in the rate base) are usually evaluated in a discretionary manner …

We develop a dynamic model of hospital competition where (i) waiting times increase if demand exceeds supply; (ii …) patients choose a hospital based in part on waiting times; and (iii) hospitals incur waiting time penalties. We show that … to higher waiting times. These results are robust to different game-theoretic solution concepts, designs of the hospital …

This paper studies the impact of hospital competition on waiting times. We use a Salop-type model, with hospitals that … from the closest hospital (monopoly segment). Compared with a benchmark case of monopoly, we find that hospital competition … hospital competition, the effect of increased competition depends on the parameter of measurement: Lower travelling costs …

We develop a dynamic regulation game for a stock externality under asymmetric information and future market uncertainty …. Within this framework, regulation is characterized as the implementation of a welfare-maximization program conditional on …-consistent policy rules that implement the stochastic first best as long as a future market exists. We apply our theory to carbon …

In this paper, we study regulation of externalities involving many small-scale polluters, where the damages from … such regulations should be designed and combined. We find that the optimal regulation design crucially depends on the type … technology regulation encourages cleaner technologies in high damage areas, but discourages their use in low damage areas …

materialize. Financial regulation encouraging the decarbonization of the banks' balance sheets via tax-subsidy schemes …