| Description |
This the Citizenship Regime Inclusiveness Index (CITRIX) mainly builds on selected and partly modified indicators of the Migration and Integration Policy Index (MIPEX) strand on the Access to Nationality. It also uses the citizenship indicators of Fitzgerald et al. (2014) as well as the resources offered by DEMIG and GLOBALCIT as further cornerstones for data collection. Covering a total of 23 OECD countries from 1980 to 2014 (805 country-year observations), CITRIX zooms in on four fundamental components of citizenship regimes relating to the acquisition of nationality by immigrants and their children: (1) the residence duration requirement for ordinary naturalization; (2) the toleration of dual citizenship in naturalization; (3) further naturalization requirements, namely language and citizenship tests as well as economic and criminal record condition; and (4) the strength of jus soli.
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