身边的经济学·社会常识英语30篇（4）
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Why Some People Wait for Others to Act
为何有人总等别人先行动？
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A street light is broken, but no one calls the city office.
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Each person thinks, 'Someone else will do it.'
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This is called the free-rider problem.
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People enjoy clean parks or safe streets—but don’t always help keep them that way.
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Groups solve it by sharing tasks—like taking turns cleaning a shared kitchen.
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Clear rules and small rewards help: 'Next person who reports trash gets coffee.'
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Trust grows when people see others doing their part.
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Good action starts small—and spreads when it feels fair and easy.