Giải pháp hạn chế túi nilon

cửa hàng hoa quả nên thưởng tiền cho khách tự mang túi của mình, chứ đừng tính tiền túi giấy (tự bán) nhé...
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Dear Dan,

I shop at two different grocery stores. One charges a nickel for paper bags, while the other gives me a nickel when I bring my own bag. Which approach is more likely to reduce paper-bag use?
—Paul 

The general question you’re raising is whether punishment or reward is better at motivating (khuyến khích, tạo động lực) us to change our behavior (thay đổi hành vi). Punishments are very powerful for motivating people to do something that they only have to do once—for example, installing a smoke alarm in their house or immunizing their children.

But when it comes to repeated behaviors, positive rewards are more effective. In a study conducted in a New York hospital in 2011, researchers found that when physicians were given positive feedback for washing their hands regularly, compliance with the hospital’s handwashing policy rose from 10% to 90%. I suspect that the same principle would hold here: Offering shoppers a credit for bringing their own bag should yield better results.

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