An approach is developed to examine the impact of product characteristics on choice using a quantity-dependent hedonic model with retail panel data. Since panel data for individual products from retail settings can include a large number of zero sales. a modification of the zero-inflated Poisson (ZIP) regression model is proposed for estimation. Results for this model compare favorabl... https://www.roamingfreesims.com/product-category/bag-hf-dimmable-ballasts/