Thomas J. Steenburgh. The Invariant Proportion of Substitution Property (IPS) of Discrete-Choice Models. Marketing Science, 27(2):300-307, 2008. [doi]
@article{Steenburgh08,
title = {The Invariant Proportion of Substitution Property (IPS) of Discrete-Choice Models},
author = {Thomas J. Steenburgh},
year = {2008},
doi = {10.1287/mksc.1070.0301},
url = {http://dx.doi.org/10.1287/mksc.1070.0301},
researchr = {https://researchr.org/publication/Steenburgh08},
cites = {0},
citedby = {0},
journal = {Marketing Science},
volume = {27},
number = {2},
pages = {300-307},
}