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加州亿万富翁税：美国最大州经济面临的风险
California's billionaire tax: What's at risk for the biggest state economy in America
California's billionaire tax would generate quick revenue, but Norway's example shows the longer-term economic impact of targeting the wealthy is unclear.
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看懂新闻只是起点——沿量化金融路径，把它变成能交付的工程能力