因果推理
混淆
因果关系(物理学)
计量经济学
统计推断
对比度(视觉)
工具变量
推论
经济
因果模型
结果(博弈论)
变量(数学)
心理学
人工智能
计算机科学
统计
数学
微观经济学
数学分析
物理
量子力学
出处
期刊:The journal of financial data science
[Pageant Media US]
日期:2023-03-14
卷期号:5 (2): 9-22
标识
DOI:10.3905/jfds.2023.1.122
摘要
Making reliable causal inferences is integral to both explaining past events and forecasting the future. Although there are various theories of economic causality, there has not yet been a wide adoption of machine learning techniques for causal inference within finance. One recently developed framework, double machine learning, is an approach to causal inference that is specifically designed to correct for bias in statistical analysis. In doing so, it allows for a more precise evaluation of treatment effects in the presence of confounders. In this article, the author uses double machine learning to study market contagion. He considers the treatment variable to be the weekly return of the S&P 500 Index below a specific threshold and the outcome to be the weekly return in a single major non-US market. In analyzing each non-US market, the other non-US markets under consideration are used as confounders. The author presents two case studies. In the first, outcomes are observed in the same week as the treatment is observed and, in the second, in the week after. His results show that, in the first case study, sizable and statistically significant contagion effects are observed but somewhat diluted due to the presence of confounders. In contrast, in the second case study, more ambiguous contagion effects are observed and the level of statistical significance is measurably lower than those observed in the first case study, indicating that contagion effects are most clearly transmitted in the same week that the dislocation in the S&P 500 occurs.
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