Online-only Table 2.

Description of dataset columns.

id	unique ID used for each policy
country_name	country name that implemented the restriction
iso3	unique three-letter country code published by the International Organization for Standardization. Non-standard codes: XKX - Kosovo, SOL - Somaliland, EUR - European Union Schengen Zone
iso2	unique two-letter country code published by the International Organization for Standardization. Non-standard codes: XK - Kosovo, XS - Somaliland, EU - European Union Schengen Zone
policy_type	one of COMPLETE, PARTIAL, or NOPOLICYIMPLEMENTED
policy_subtype	The policy sub-type, one of: ESSENTIAL_ONLY, CITIZEN_EXCEP, SPECIFIC_COUNTRY_EXCEP, WORK_EXCEP, VISA_BAN, CITIZENSHIP_BAN, HISTORY_BAN, REFUGEE_BAN, BORDER_CLOSURE, NONE. Note: Only the most restrictive partial closure is included, so a policy with CITIZENSHIP exception may have travel history or specific border closure information in the related fields.
start_date	the date the policy was implemented (DD_MM_YY)
end_date	the date the policy was lifted (DD_MM_YY)
air	whether there was an air border closure (1) or not (0)
air_type	whether the partial closure closed all or some air routes. One of: All, Specific, NA
targets_air	which air routes were targeted
land	whether there was a land border closure(1) or not (0)
land_type	whether the partial closure closed all or some land routes. One of: All, Specific, NA
targets_land	which land routes were targeted
sea	whether there was a sea border closure(1) or not (0)
sea_type	whether the partial closure closed all or some sea routes. One of: All, Specific, NA
targets_sea	which sea routes were targeted
citizen	whether the partial closure targets certain groups of travelers by citizenship (1) or not (0)
citizen_list	which groups were targeted based on their citizenship status
history	whether the partial closure targets certain groups of travelers by travel history (1) or not (0)
history_list	which groups were targeted based on their recent travel status
refugee	whether the partial closure uses the language of “refugee” or “asylum seeker” (1) or not (0)
refugee_list	which refugees are targeted
visa	whether visa seekers are targeted (1) or not (0)
visa_type	which visa seekers are targeted. One of: All, Specific, NA
visa_list	which visa seekers are targeted
citizen_excep	whether the complete closure makes an exception for citizens (1) or not (0)
citizen_excep_list	which persons are exempted from the complete closure
country_excep	whether specific country(ies) are exempted from the complete closure (1) or not (0)
country_excep_list	which country(ies) are exempted from the complete closure
work_excep	whether the complete closure exempts workers (1) or not (0)
source(0-4)	Web link to source of policy, one per column