Homophily in the adoption of digital proximity tracing apps shapes the evolution of epidemics

G.B. acknowledges financial support from the European Union's Horizon 2020 research and innovation program under the Marie Sklodowska-Curie Grant Agreement No. 945413 and from the Universitat Rovira i Virgili (URV). B.S. acknowledges financial support from the European Unions Horizon 2020 research and innovation program under the Marie Sklodowska-Curie Grant Agreement No. 713679 and from the Universitat Rovira i Virgili (URV). A.A. acknowledges support by Ministerio de Economia y Competitividad (Grants No. PGC2018-094754-B-C21 and No. FIS2015-71582-C2-1), Generalitat de Catalunya (Grants No. 2017SGR-896 and No. 2020PANDE00098), Universitat Rovira i Virgili (Grant No. 2019PFR-URV-B2-41), ICREA Academia, and the James S. McDonnell Foundation (Grant No. 220020325). We thank L. Arola-Fernandez and A. Cardillo for helpful comments and suggestions.