@data{heterogene/1997,
author = {Mullahy, John},
publisher = {ZBW - Leibniz Informationszentrum Wirtschaft},
title = {heterogeneity-excess-zeros-and-the-structure-of-count-data-models},
year = {1997},
version = {1},
url = {https://jda-test.zbw.eu/dataset/heterogeneity-excess-zeros-and-the-structure-of-count-data-models} 
}