Abstract The main objective of this study is to investigate the moderating roles of the competitor’s pricing strategy and the degree of consumer’s risk-aversion on perceived risk and perceived benefit in responding to price increases and package downsizing. Based on Prospect Theory, several prior researches find that consumers perceive increased price as more loss than package downsizing and perceive package downsizing as more benefit than increased price. We extend these behavioral economics approach using the referen ce effect of competitor’s pricing strategy. We focus on consumer heterogeneity on risk-aversion, measure the degree of consumer’s risk-aversion, and divide the consum-ers into two groups of high levels of risk-aversion vs. low levels of risk-aversion. We find that the firm’s pricing strategies of both price increases and package downsizing do not significantly influence the perceived benefit for relatively low risk-aversion consumers. We find that when the f irm reduce the package size, relatively high risk-aver-sion consumers perceived more benefit and had higher purchase intention compared to price increases. We also find that the competitor’s pricing strategies do not significan tly influence the consumer’s response for relatively low risk-aversion consumers. For relatively high risk-aversion consumers, they perceived more loss when the firm has different pricing strategy from the competitor’s.