Nielsen, Jens Erik, Rikke J. Broegård, and Mogens Fosgerau. “Stability of Parameters Estimated on Cross-Sectional Data”. Proceedings from the Annual Transport Conference at Aalborg University 8, no. 1 (December 31, 2001). Accessed May 5, 2024. https://journals.aau.dk/index.php/td/article/view/4784.