An academic field that studies how psychological biases and emotions influence economic decision-making, based on the premise that humans do not always act rationally. It complements the limitations of the "rational economic agent" model assumed by traditional economics.
How Behavioral Economics Affects Shopping
Behavioral economics scientifically explains why we are so susceptible to "deals" in everyday shopping. For example, when we see "Limited Time 50% Off," the feeling of "I'll lose out if I don't buy now" takes priority over whether we actually need the product. This is an example of a bias called loss aversion.
Behavioral economics also explains why coupons and discount codes so powerfully drive purchasing behavior. When you hold a 1,000-yen discount coupon, letting it expire unused feels like "losing 1,000 yen." In reality, you haven't lost anything, yet the mere existence of the coupon becomes a motivation to buy. The high usage rates of food delivery first-time discounts and PayPay campaigns are backed by this psychological mechanism.
Using Behavioral Economics to Become a Smarter Consumer
Knowledge of behavioral economics can also serve as a tool for seeing through corporate marketing strategies. Understanding that a "Only 3 left" display triggers scarcity bias, or that "Regular price 5,000 yen - Special price 2,980 yen" aims for the anchoring effect, helps you curb impulse buying.
Conversely, you can turn behavioral economics to your advantage for saving money. For example, setting up automatic savings transfers on payday leverages the "default effect," and using the psychology of feeling rewarded by point cashback enables planned shopping. Simply knowing that biases exist is the first step toward more rational consumer behavior.
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