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<p>This paper investigates the effect of public disclosure of detailed location information from people who tested positive for COVID-19 in South Korea. I use the actual travel histories of confirmed individuals including locations they visited before being quarantined, foot traffic measures based on mobile phone signals, consumer spending data based on card transactions, and the number of new jobs at the district level in Seoul. The findings show that public disclosure of the travel histories in a given district decreased foot traffic, consumer spending, and new employment there in the short run and did not increase new confirmed cases in exposure locations. These results suggest that while public disclosure caused economic losses in the short term, it played a role in preventing the transmission of infections. The study provides policy implications for designing effective responses to future shocks.</p>

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Everyone knows what you did: evidence from public disclosure of travel logs

  • 期刊论文

  • 发表日期：

    2025年10月28日

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  • Chungeun Yoon

摘要

This paper investigates the effect of public disclosure of detailed location information from people who tested positive for COVID-19 in South Korea. I use the actual travel histories of confirmed individuals including locations they visited before being quarantined, foot traffic measures based on mobile phone signals, consumer spending data based on card transactions, and the number of new jobs at the district level in Seoul. The findings show that public disclosure of the travel histories in a given district decreased foot traffic, consumer spending, and new employment there in the short run and did not increase new confirmed cases in exposure locations. These results suggest that while public disclosure caused economic losses in the short term, it played a role in preventing the transmission of infections. The study provides policy implications for designing effective responses to future shocks.