Modelling the time-varying risk premium by using the Kalman filter : the Euro money market caseFilipozzi, FabioFindEcon Monograph Series : Advanced in Financial Market Analysis2011 / p. 127-140 : ill https://econpapers.repec.org/bookchap/annfindec/book_3ay_3a2011_3an_3a09_3ach_3a08_3amon.htm