Examining the dimensionality of coupon proneness: a random coefficients approach

Many previous studies have sought to measure consumers’ coupon proneness but have tended to assume that this trait is unidimensional in nature, i.e., an individual's coupon proneness is the same for all types of coupons. It is argued in this study that because consumers differ in the products they shop for and in the types of coupons they are exposed to, their coupon proneness is likely to vary across different coupon types, i.e., is likely to be multidimensional. The authors test this proposition using the item response theoretic (IRT) model proposed by Bawa et al. (J. Marketing Res. 34 (1997) 517). In the Bawa et al. study a single coupon proneness parameter was estimated for each individual. The current study extends the IRT model via a random coefficients approach and estimates separate coupon proneness parameters for different coupon types. The results indicate the presence of distinct segments among consumers, with some consumers displaying a generalized coupon proneness tendency across coupon types and others displaying type-specific coupon proneness.