c.......................................
      integer*4 maxbuf
      parameter (maxalt= 3,
c                      =max no. of alternatives
     *           maxper=30,
c                      =max no. of time periods (for panel data)
     *           maxnt =90,
c                      =max(nper*nalt)
     *           maxnt1=60,
c                      =max(nper*(nalt-1))
     *           maxnb =60,
c                      =max no. of slope coefficients
     *           maxns =50,
c                      =max no. of variance/covariance coefficients
     *           maxnpp=100,
c                      =max(nb+ns)
     *           maxbuf=250000,
c                      =max no. of data points (nb*nobs)
     *           maxnp =maxnb+maxns,
     *           maxndm=maxper*maxnb)
c.......................................