 The Law and Economics course at the Barcelona International Summer School is aimed at presenting new novel approaches basically to the traditional law structures of either justice and fairness, either through the traditional structures of economics where we're talking about efficiency. So with the challenge of climate change and the sustainable development that we have right now, this course aims to present those issues to the students that are interested in the topic with the traditional tools of Law and Economics, talking about the least cost avoider, talking about incentives, talking about how we can advance new policies while being useful for the society as a whole. The important thing about this course is that we're not doing it in a traditional way, so what we're going to be doing is some ex-cathedra teaching, but also problem-based learning, meaning that the students themselves are going to be reading case law, case studies, and then presenting their points of view. So that is an important addition to the programs that the students have been seeing before. We welcome anybody with a background in law, or in economics, or political sciences in general to join us.