Signal Congruence, Message Specificity, and Post-Purchase Corrections in Omnichannel Markets: Evidence from a Calibrated Synthetic Transaction Panel

Abstract

Markets increasingly rely on signals that stand in for direct product inspection, and these signals rarely appear one at a time. Consumers encounter ad claims, package text, price position, warranty language, return terms, and platform descriptions in rapid sequence, then revise their beliefs again after purchase if the realized experience differs from the marketed promise. This paper examines whether the internal consistency of those visible cues matters as much as their intensity. The empirical study uses a calibrated synthetic panel that combines product-channel-week observations, order-level post-purchase outcomes, and linked firm-quarter service-cost records for durable and semi-durable consumer goods. The central constructs are signal congruence, defined as the degree of alignment across a product’s concurrent market-facing messages, and message specificity, defined as the precision and verifiability of claims communicated before purchase. The analysis estimates a system of conversion, return, claim, and abnormal accrual equations with product, brand, channel, and period effects, supplemented by event-time designs around staggered signal-standardization adoptions. The results indicate that signal congruence is positively associated with conversion and negatively associated with both returns and service-cost volatility. Message specificity has a nonlinear relationship with performance: moderate increases improve conversion when signals are aligned, while very high specificity in the presence of discordant cues predicts a rise in returns, claims, and accrual error. These effects are stronger for high-consideration categories and more pronounced when price premiums are large. Event-time estimates support the same pattern and show limited evidence of anticipatory pretrends. The findings suggest that visible marketing signals operate most effectively when descriptive detail, protective terms, and price position communicate a common underlying promise.