Public transport (urban and intercity) is organized in Spain both through concession contracts and public ownership. The regulator fixes prices and level of services,as well as the level of subsidy. This paper examines the regulated system in the Spanish bus industry in the last decades.

The paper presents the results of a research on railway regulation and liberalisation in Italy, France, Germany and Spain. The analysed fields of regulation are the relationship between the State and the rail companies, network access conditions by operators, slot allocating and pricing schemes...

We consider an industry with firms that produce a final good emitting pollution to different degree as a side effect. Pollution is regulated by a tradable quota system where some quotas may have been allocated at the outset, i.e. before the quota market is opened. We study how volatility in...