1Antos,J,W.Mellow and J.E,Tiplett(1979),What is a current equivalent to unemployment rates of the past? Mothly Labor Review,102,36-47.
2Bean,C.R.(1994),European unemployment:a survey,Journal of Economic Literature,32,573-619.
3Blanchard,O.J.(1990),Unemployment:Getting the questions right--and some of the answer, in J.H.Drczc and C.R.Bean (eds),Europe'sUnemployment Problem.MIT Press,Canbridge,MA.
4Blanchard,O.J. and L.F,Katz (1997),What We Know and do not Know about the marural rate of unemployment,journal of Economic Perpecrives,11,11-32.
