Coefficient estimates:
Coefficient estimates for θ: 
   +0.008815 (   +0.001299)    +6.786540 log_inc * msrp
   +0.427599 (   +0.022444)   +19.051542 fam_size * van
   -1.971187 (   +0.076948)   -25.616993 urban * truck
   +0.764700 (   +0.063275)   +12.085345 log_inc
   +0.982845 (   +0.048614)   +20.217364 rc on log_mpg
   +0.974612 (   +0.572497)    +1.702388 rc on suv
Coefficient estimates for β: 
  -79.931574 (   +3.891221)   -20.541517 constant
   +2.602020 (   +0.313908)    +8.289111 log_mpg
   +3.986732 (   +0.480909)    +8.289986 log_hp
   +1.588083 (   +0.805533)    +1.971469 log_footprint
   +3.221607 (   +0.717166)    +4.492133 log_curbweight
   -0.823805 (   +0.521686)    -1.579120 suv
   -1.823808 (   +0.214408)    -8.506252 van
   +0.600870 (   +0.187425)    +3.205926 truck
   -0.217279 (   +0.019558)   -11.109270 msrp
   +1.218468 (   +0.208408)    +5.846565 dum_year_1981
   +1.342602 (   +0.227210)    +5.909073 dum_year_1982
   +1.737417 (   +0.214777)    +8.089405 dum_year_1983
   +1.780171 (   +0.215081)    +8.276756 dum_year_1984
   +2.268822 (   +0.207629)   +10.927283 dum_year_1985
   +2.007787 (   +0.200745)   +10.001700 dum_year_1986
   +2.141674 (   +0.196358)   +10.906969 dum_year_1987
   +1.592143 (   +0.182892)    +8.705375 dum_year_1988
   +1.085920 (   +0.175208)    +6.197882 dum_year_1989
   +0.625647 (   +0.167812)    +3.728262 dum_year_1990
   +0.246460 (   +0.166596)    +1.479389 dum_year_1991
   +0.210064 (   +0.163438)    +1.285287 dum_year_1992
   +0.368635 (   +0.164058)    +2.246982 dum_year_1993
   +0.468178 (   +0.163336)    +2.866347 dum_year_1994
Convergence criteria:
                       minimum: 79227.97831273059
                    iterations: 10
       iteration_limit_reached: false
                     converged: true
                   f_converged: true
                   g_converged: true
                   x_converged: false
                       f_calls: 11
                       g_calls: 11
                       h_calls: 9
                f_trace (last): 79227.97831273059
           g_norm_trace (last): 5.235605533906997e-6
                x_trace (last): [1.5358921960703162, 0.3578554072791924, -0.5350100367411808, 0.8039025820923998, 2.2451646383516377, -0.06859931316013779]
                      time_run: 701.3914430141449
