Effects of the COVID-19 Pandemic on Population Mobility under Mild Policies: Causal Evidence from Sweden

TL;DR

This study uses mobile phone data from Sweden to show that even mild COVID-19 policies significantly reduced mobility and social interactions across different socio-economic groups.

Contribution

It provides causal evidence that mild policies can effectively influence population mobility during a pandemic using a Difference-in-Differences approach.

Findings

Residential population increased by 64% during the day

Mobility distance decreased by 38%

Reductions were consistent across socio-economic groups

Abstract

Sweden has adopted far less restrictive social distancing policies than most countries following the COVID-19 pandemic. This paper uses data on all mobile phone users, from one major Swedish mobile phone network, to examine the impact of the Coronavirus outbreak under the Swedish mild recommendations and restrictions regime on individual mobility and if changes in geographical mobility vary over different socio-economic strata. Having access to data for January-March in both 2019 and 2020 enables the estimation of causal effects of the COVID-19 outbreak by adopting a Difference-in-Differences research design. The paper reaches four main conclusions: (i) The daytime population in residential areas increased significantly (64 percent average increase); (ii) The daytime presence in industrial and commercial areas decreased significantly (33 percent average decrease); (iii) The distance individuals move from their homes during a day was substantially reduced (38 percent decrease in the maximum distance moved and 36 percent increase in share of individuals who move less than one kilometer from home); (iv) Similar reductions in mobility were found for residents in areas with different socioeconomic and demographic characteristics. These results show that mild government policies can compel people to adopt social distancing behavior.