CITIZENSHIP LAW INDICATORS
About CITIZENSHIP LAW INDICATORS
CITLAW indicators measure the degree of inclusion and freedom of choice for the target group of a legal provision. For birthright, naturalisation and conditions for renunciation the absence of a provision or the most restrictive conditions result in an indicator score of 0, whereas unconditional entitlements or the most inclusive provisions get a score of 1. For involuntary loss through withdrawal or automatic lapse, the absence of a provision results in a score of 1 and the most extensive state powers to withdraw citizenship in a score of 0.
Basic indicator scores are calculated on the basis of a list of substantive and procedural requirements for each mode of acquisition or loss using both additive and weighting formulas.
CITLAW indicators are also aggregated at different levels in order to analyse more general features of citizenship laws. Formulas for calculating combined indicators are included in the pop-up descriptions in the chart menus. The 6 highest level CITLAW indicators that are calculated using all 45 basic indicators are: ius sanguinis, ius soli, residence-based ordinary naturalisation, naturalisation on specific grounds, voluntary renunciation and withdrawal/lapse.
The first instalment of CITLAW indicators is based on citizenship on 31 December 2011. The second instalment of CITLAW indicators is based on citizenship laws on 1 January 2016.
The CITLAW indicators have been developed by Rainer Bauböck (European University Institute), Iseult Honohan and Kristen Jeffers (University College Dublin) in consultation with Maarten Vink (University of Maastricht) and Thomas Huddleston (MPG). Nathalie Rougier has provided research assistance in coding the CITLAW indicators for 2015.