Researchers have investigated several aspects of consumers’ responses to sales promotions. Inquiry has primarily focused on whether, and by how much, promotions increase choice at the time of the promotion (Goodman and Moody 1970; Massy and Frank 1965). Related research investigated the ability of variables such as promotion type (Schneider and Currim 1991) and promotion value (Leone and Srinivasan 1996) to moderate the relationship between promotion and choice. While relatively fewer studies have been conducted, researchers have also examined if sales promotions have an impact that extends beyond the time they are offered. In so doing, rationale has been forwarded both to predict that promotions will decrease preference for a brand and that they will increase preference for a brand. Making prediction even more difficult, the mechanisms associated with a positive post-promotion effect and those associated with a negative effect may operate simultaneously (Blattberg and Neslin 1989).