Magic odd numbers: The effect of numerical parity on variety-seeking

Numbers are widely employed to convey product and other marketing related information and thereby influence consumer judgment and behavior. Drawing on the literature of numerical cognition, associative learning, goal activation, and variety-seeking, the current research examines how numerical parity affects consumers' variety-seeking behavior. Across one Implicit Association Test (IAT) and four experiments, we demonstrate that consumers associate odd (vs. even) numbers with changeability (vs. stability) in their minds (Study 1). We further find that exposure to product and other marketing related information that is presented with odd (vs. even) numbers increases consumers' tendency to seek variety in subsequent purchase decisions, and that this effect consistently appears in the voluntary selection of a set of options (Study 2a), the preference for diversified products (Study 2b and 3), and the choice of diversified product bundles (Study 2c). We further demonstrate that desire for change underlines this effect, such that exposure to odd numbers (vs. even numbers) activates consumers' desire for change, which in turn elevates their subsequent variety-seeking behavior (Study 3). The findings of the current research not only contribute to the literature, but also provide marketers with effective ways to facilitate consumers' variety-seeking behavior, such as by strategically using odd numbers in their marketing efforts.