The moderating effect of solar radiation on the association between human mobility and COVID-19 infection in Europe

• Main Authors: ZHAO, Wenyu, ZHU, Yongjian, XIE, Jingui, ZHENG, Zhichao, LUO, Haidong, OOI, Oon Cheong
• Format: text
• Language: English
• Published: Institutional Knowledge at Singapore Management University 2022
• Subjects: COVID-19; Human mobility; Moderating effect; Solar radiation; Operations and Supply Chain Management; Place and Environment; Public Health
• Online Access: https://ink.library.smu.edu.sg/lkcsb_research/6954; https://ink.library.smu.edu.sg/context/lkcsb_research/article/7953/viewcontent/11356_2021_Article_15738_pvoa.pdf
• Institution: Singapore Management University

The novel coronavirus disease 2019 (COVID-19) has caused a global pandemic. Some studies have suggested a negative association between sunlight intensity and COVID-19 infection, alluding to the belief that it might be safe to go out on sunny days. This paper examined whether solar radiation mitigated the association between human mobility and COVID-19 infection in Europe using a dynamic panel data model to investigate the effect of human mobility, solar radiation, and their interaction on COVID-19 infection. The results revealed that outgoing mobility was positively correlated and solar radiation was negatively correlated with COVID-19 infection at lag levels of 1, 2, and 3 weeks. The coefficients of the interaction items indicated that solar radiation negatively moderated the relationship between outgoing mobility and the number of daily new confirmed cases at 2- and 3-week lag levels. However, the moderating effect was limited and unable to eliminate the positive effect of outgoing mobility on COVID-19 infection. Thus, these results suggested that solar radiation only weakly mitigated the relationship between human mobility and COVID-19 infection, providing policy implications that mobility should still be restricted on sunny days during the COVID-19 pandemic.