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When facing the same discount amount, consumers appear to overweight the discount of the cheap item than that of the expensive one. This irrational behavior is widely mentioned and explained by various behavioral economics theories, such as the “framing effect” and “prospect-theory value function” (Kahneman and Tversky, 1981, p.347), and “mental accounting” and “transaction utility” (Thaler, 1999, p.186-189).
In his journal “Do Consumers Mak Too Much Effort to Save on Cheap Items and Too Little to Save on Expensive Items? Experimental Results and Implications for Business Strategy”, Prof. Ofer Azar re-discusses this behavior by imposing “relative thinking” theory. Relative thinking presents the tendency of consumers to take into account the relative price difference in front of goods. Through analyzing an experiment among the Northwestern University students, he figures out that for participants, the value of their time is increasing as the items’ prices increase. In other words, consumers are willing to use more effort to save when they purchase merchandises with lower price. This result is “consistent with relative thinking” (Azar, 2011, p.1078) and rejects the assumption of other theories, because they only focus on the “absolute price differences” (Azar, 2011, p.1078), rather than “relative price differences” (Azar, 2011, p.1078). Further, Prof. Azar critiques five alternative explanations ---- prospect-theory value function, purchase frequency, transaction utility, fairness and wealth perception. In his opinion, prospect theory makes mistake to directly frame cost of goods as a loss; purchasing frequency has limitations, firstly the experiment presented is one-time purchase and is irrelevant with purchase frequency, secondly...

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...ntal accounting too. If consider this strategy deeper, the prospect theory value function plays is the base corner of the explanation.
Finally people are not rationally time-consistent, they are not good at predicting their behavior. They may exhibit in a different way when they face the real situation, because of the social presses and time limitation. But in many behavioral economic studies, using assumed scenarios to build the experiment is still the major measure. Therefore, this is maybe the third limitation in this literature, even in other articles.
Although there are some defects in this paper, Prof. Azar offers a comprehensive analysis of his thesis and well organized the contents and structure. Thus this is an excellent paper. It can be seemed as a strong alternative explanation to consumers’ different effort on saving on cheap items and expensive items.

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