Papers posted on this site are in progress, under submission, or in press and forthcoming elsewhere. Working Papers are offered on this site by the author, also in the interest of receiving feedback. Working Papers are not refereed, but the Steering Group of the Centre evaluates which papers will be published. Papers in this series may be in various stages of completion, but they may nonetheless be cited freely. You can find a suggested citation in each paper. If you are interested in publishing something in this series, please contact any member of the Steering Group: Hanna Kuusela, Heikki Patomäki or Matti Ylönen.