This article draws on social dilemma theory and reference group theory to understand the individual boycott decision and tests the predictions stemming from this conceptualization in two experiments. Consistent with our predictions, consumers' likelihood of participating in both economic and...

Through five experiments, we provide a cognitive account of when and why nine-ending prices are perceived to be smaller than a price one cent higher. First, this occurs only when the leftmost digits of the prices differ (e.g., $2.99 vs. $3.00). Second, the left-digit effect also depends on the...