This Year’s Winning Stock Trades Take the Brunt of War Selloff

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中国咖啡大战迈入矩阵博弈时代

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Counterfactuals Causal inference is easier when the effects are large and sudden. The COVID-19 pandemic and accompanying policy measures caused economic disruption so stark that sophisticated statistical approaches were unnecessary for many questions. For example, unemployment jumped sharply in the early weeks of the pandemic, leaving little room for alternative explanations.

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Matthew and Nicola Smith