Coefficient estimates:
Coefficient estimates for θ: 
   +0.006740 (   +0.001270)    +5.305559 log_inc * msrp
   +0.452156 (   +0.022984)   +19.672812 fam_size * van
   -2.038149 (   +0.077037)   -26.456798 urban * truck
   +0.814217 (   +0.061715)   +13.193078 log_inc
   +0.974293 (   +0.046894)   +20.776557 rc on log_mpg
   +0.000059   unavailable  unavailable  rc on suv
Coefficient estimates for β: 
  -80.460279 (   +3.884551)   -20.712893 constant
   +2.611380 (   +0.312958)    +8.344174 log_mpg
   +3.973177 (   +0.480111)    +8.275544 log_hp
   +1.625279 (   +0.804104)    +2.021230 log_footprint
   +3.183479 (   +0.715942)    +4.446562 log_curbweight
   -0.405126 (   +0.245023)    -1.653423 suv
   -1.901619 (   +0.215218)    -8.835761 van
   +0.646154 (   +0.187018)    +3.455042 truck
   -0.195034 (   +0.019276)   -10.117742 msrp
   +1.210719 (   +0.208030)    +5.819915 dum_year_1981
   +1.343251 (   +0.226861)    +5.921019 dum_year_1982
   +1.715121 (   +0.214147)    +8.009101 dum_year_1983
   +1.768314 (   +0.214582)    +8.240734 dum_year_1984
   +2.258821 (   +0.207127)   +10.905481 dum_year_1985
   +1.995203 (   +0.200246)    +9.963754 dum_year_1986
   +2.116780 (   +0.195684)   +10.817327 dum_year_1987
   +1.587440 (   +0.182664)    +8.690489 dum_year_1988
   +1.082641 (   +0.174942)    +6.188557 dum_year_1989
   +0.609554 (   +0.167467)    +3.639850 dum_year_1990
   +0.244042 (   +0.166269)    +1.467757 dum_year_1991
   +0.192653 (   +0.163131)    +1.180974 dum_year_1992
   +0.357152 (   +0.163754)    +2.181027 dum_year_1993
   +0.461129 (   +0.163020)    +2.828664 dum_year_1994
Convergence criteria:
                       minimum: 79189.10545613003
                    iterations: 11
       iteration_limit_reached: false
                     converged: true
                   f_converged: true
                   g_converged: true
                   x_converged: false
                       f_calls: 12
                       g_calls: 12
                       h_calls: 12
                f_trace (last): 79189.10545613003
           g_norm_trace (last): 9.411790586286823e-5
                x_trace (last): [1.174031907271043, 0.37581998388729654, -0.5532319248498017, 0.852117502345525, 2.2364250673520827, -9.782158034075707]
                      time_run: 864.9410099983215
