Choice observations of yogurt purchases by 100 households
Data from Jain et al. (1994) containing 2,412 choice observations from a series of yogurt purchases by a panel of 100 households in Springfield, Missouri, over a roughly two-year period. The data were collected by optical scanners and contain information about the price, brand, and a "feature" variable, which identifies whether a newspaper advertisement was shown to the customer. There are four brands of yogurt: Yoplait, Dannon, Weight Watchers, and Hiland, with market shares of 34%, 40%, 23% and 3%, respectively.
data(yogurt)
| Variable | Description |
id |
individual identifiers |
obsID |
identifier for unique choice observation |
alt |
alternative in each choice observation |
choice |
dummy code for choice (1 or 0) |
price |
price of yogurt |
feat |
dummy for whether a newspaper advertisement was shown to the customer (1 or 0) |
brand |
yogurt brand: "yoplait", "dannon", "hiland", or "weight" (for weight watcher) |
dannon |
dummy variable for the "dannon" brand (1 or 0) |
hiland |
dummy variable for the "hiland" brand (1 or 0) |
weight |
dummy variable for the "weight" brand (1 or 0) |
yoplait |
dummy variable for the "yoplait" brand (1 or 0) |
Raw data downloaded from the package mlogit v0.3-0 by Yves Croissant archive
Dipak C. Jain, Naufel J. Vilcassim & Pradeep K. Chintagunta (1994) A Random-Coefficients Logit Brand-Choice Model Applied to Panel Data, Journal of Business & Economic Statistics, 12:3, 317-328, doi: 10.1080/07350015.1994.10524547
data(yogurt) head(yogurt)
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