Mixtures of logit with Monte-Carlo 500 antithetic draws

Estimation of a mixtures of logit models where the integral is approximated using MonteCarlo integration with antithetic draws.

Michel Bierlaire, EPFL Sun Jun 29 2025, 06:47:25

from b07estimation_specification import get_biogeme
from IPython.core.display_functions import display

import biogeme.biogeme_logging as blog
from biogeme.expressions import Draws
from biogeme.results_processing import (
    EstimationResults,
    get_pandas_estimated_parameters,
)

logger = blog.get_screen_logger(level=blog.INFO)
logger.info('Example b07estimation_monte_carlo_anti_500.py')

Example b07estimation_monte_carlo_anti_500.py

R = 500

the_draws = Draws('b_time_rnd', 'NORMAL_ANTI')
the_biogeme = get_biogeme(the_draws=the_draws, number_of_draws=R)
the_biogeme.model_name = 'b07estimation_monte_carlo_anti_500'
results_file = f'saved_results/{the_biogeme.model_name}.yaml'

Biogeme parameters read from biogeme.toml.

try:
    results = EstimationResults.from_yaml_file(filename=results_file)
except FileNotFoundError:
    results = the_biogeme.estimate()

print(results.short_summary())

Results for model b07estimation_monte_carlo_anti_500
Nbr of parameters:              5
Sample size:                    10719
Excluded data:                  9
Final log likelihood:           -8570.402
Akaike Information Criterion:   17150.8
Bayesian Information Criterion: 17187.2

Get the results in a pandas table

pandas_results = get_pandas_estimated_parameters(
    estimation_results=results,
)
display(pandas_results)

{'Estimated parameters':         Name     Value  Robust std err.  Robust t-stat.  Robust p-value
0  asc_train -0.468579         0.047928       -9.776641    0.000000e+00
1     b_time -1.854738         0.075422      -24.591465    0.000000e+00
2   b_time_s  1.192866         0.089438       13.337393    0.000000e+00
3     b_cost -0.844880         0.057563      -14.677592    0.000000e+00
4    asc_car  0.178398         0.035072        5.086608    3.645244e-07}