The vast majority of statistical models used in marketing yield only one value for each "$\beta$," which marketers assume is valid for everyone; yet this concept is in direct contrast to the idea of heterogeneity.

Question

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Although heterogeneity implies people react differently,most marketing models assume everyone will react the same way when a particular situation is faced or a variable is modified.

The Vast Majority of Statistical Models Used in Marketing Yield β\betaβ

The Vast Majority of Statistical Models Used in Marketing Yield $\beta$