Intermittently Singapore suffers from severe air pollution in periods of intense forest and peatland fires on neighboring South-Asian islands. A recent American Economic Review article modeled the causal relationships between fire intensity in Indonesia and air pollution (PSI) in Singapore, and between PSI and health clinic visits in Singapore. We find serious flaws in the quantitative assessment of these relationships. Attempts are made to repair these using the same classic methodology and data, but also by alternative methods requiring less speculative assumptions. Although actually more detailed data are required, also some results are produced which seem more credible.

中文翻译：

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新加坡雾霾的成因及其对健康的影响：一项重复研究

在邻近的南亚岛屿发生森林和泥炭地火灾时，新加坡间歇性地遭受严重的空气污染。美国经济评论最近的一篇文章模拟了印度尼西亚火灾强度与新加坡空气污染 (PSI) 之间的因果关系，以及新加坡的 PSI 与健康诊所就诊之间的因果关系。我们发现这些关系的定量评估存在严重缺陷。尝试使用相同的经典方法和数据修复这些问题，但也尝试使用需要较少推测性假设的替代方法。虽然实际上需要更详细的数据，但也产生了一些看起来更可信的结果。