Carvalho, V., Garcia, J., Hansen, S., Ortiz, Á., Rodrigo, T., Rodríguez Mora, J. & Ruiz, P. 2021, 'Tracking the COVID-19 crisis with high-resolution transaction data', Royal Society Open Science, 8(8), article no: 210218. https://doi.org/10.1098/rsos.210218