I have been working on a series of related topics and themes over the past few years, as I try to outline below. By clicking on the links you find some of the publications this has resulted in. For an exhaustive, non-narrative overview of my publications, I refer to my CV and this page (which contains downloadable pdfs of most of my published papers and working papers). I'm always in for discussing these topics or starting up collaborations on them. Feel free to contact me if you would have any questions or suggestions, or if you simply have trouble getting access to any of the mentioned papers.