身边的经济学·社会常识英语30篇（1）

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衡量不平等：从基尼系数到真实生活

Economists use the Gini coefficient—a number between 0 and 1—to measure income inequality across a population.
A score of 0 means perfect equality, while 1 means one person holds all income and others have none.
National statistics offices calculate it using household survey data collected regularly and confidentially.
But the Gini hides important details, like whether inequality is rising among the middle class or only at the extremes.
Alternative measures include the Palma ratio, which compares top 10% income to bottom 40% income.
Wealth inequality—measured separately—is usually far greater than income inequality due to asset accumulation.
Policymakers also study access to education, healthcare, and housing to understand inequality beyond money.
Cross-country comparisons require careful adjustments for cost-of-living differences and tax systems.
High inequality can slow economic growth if large groups lack resources to participate fully in markets.
Ultimately, these tools help societies decide whether current policies are building fairness—or deepening divides.