Table 7.

Summary of the articles measuring NPIs via proxy data. The first column describes the main categories. The second the type of data used. The third, the country of study and the references.

Category	Proxy data type	Country and reference
Adoption of NPI	Mobile phones and/or vehicles through location intelligence and measurement platforms	USA [367], [368], [369], [370], [371], [372]
	Twitter	Twitter population [373], [374]
	Wikipedia and Reddit	Canada, Italy, USA, UK [375]
	Google	USA [376]; 130 countries [377]
	TV	USA [378]
Mobility changes	Mobile phones and/or vehicles through location intelligence and measurement platforms	USA [37], [38], [379], [380]
	Facebook	Italy [39]
	Citymapper app	22 countries [381]