Here I would like to take the opportunity to suggest the addition of a subforum for the purpose of discussing quantitative and mathematical economics. This idea came up after I posted in a few recent topics (1st topic, 2nd topic). I am also partially motivated by QuantEcon, a website pointed out on different occasions by @jedishrfu in connection with Python programming. (QuantEcon has a forum itself in the form of a Google group.) Mathematically inclined economists and econometricians often develop and employ interesting techniques in their research. While some of those techniques can also be found inside the physicist's and classical applied mathematician's toolbox, they seem to appear less frequently on PF. For example, one can think of mathematical programming optimal control theory set-valued analysis stochastic calculus regression and testing statistical computation but clearly this list is not exhaustive. The subforum may attract new members and provide the opportunity for existing members to become acquainted with new topics related to their established interests. It could live in the "other sciences" category. For clarity I would like to stress that I believe it should not become a place for the discussion of subjects of a political, moral or philosophical nature. I am interested in hearing opinions of members and staff, old and new. Best wishes, Krylov.