Helveston JP. logitr: Fast Estimation of Multinomial and Mixed Logit Models with Preference Space and Willingness-to-Pay Space Utility Parameterizations. J. Stat. Soft. [Internet]. 2023 Feb. 7 [cited 2024 Dec. 3];105(10):1-37. Available from: https://www.jstatsoft.org/index.php/jss/article/view/v105i10