Replication Data for: A global panel dataset of dyadic dual citizenship acceptance

Dual citizenship provides access to secure legal status and rights in more than one country for an unprecedented number of migrants and their descendants around the world. While this requires the matching of legal regulations between two states, existing studies of dual citizenship typically focus on either migrant origin or destination perspectives. To explore the dyadic nature of this phenomenon we introduce the GLOBALCIT Dyadic Dual Citizenship Acceptance Dataset, covering over 1.8 million directed dyad-year observations measuring the legal rules in place in up to 201 states back to 1960. We identify regulatory trends and present estimates of the number and proportion of global migrants affected by changing policy constellations, as well as variation in acceptance across political regimes. We show that migrants are more likely to acquire destination country citizenship, and thus achieve democratic representation, in constellations where they can maintain a legal link with their origin country. The GcDDCAD is made available freely for non-commercial use by the general public. Data are not intended to be used for determining citizenship status in individual cases, for which it is recommended to seek professional legal advice. We ask users to acknowledge its source when using the data by citing this paper: Vink, M., Van der Baaren, L. and Reichel, D. (2025). A global panel database of dyadic dual citizenship acceptance. International Migration Review. The file 'readme.txt' provides guidance on how to use the replication file posted in this dataverse to replicate the findings reported in the paper.双重国籍（Dual Citizenship）可为全球范围内史无前例规模的移民及其后裔提供多国合法身份与权利保障。尽管双重国籍的实施需以两国法律规制的相互适配为前提，但现有双重国籍研究通常仅聚焦于移民来源国或目的国的单一视角。为探究这一现象的二元属性，本研究推出GLOBALCIT二元双重国籍接纳数据集（GLOBALCIT Dyadic Dual Citizenship Acceptance Dataset），该数据集涵盖逾180万条定向二元年度观测数据，可回溯至1960年，覆盖多达201个国家的现行法律规则。研究团队梳理了相关规制的演变趋势，并估算出受政策格局变化影响的全球移民总规模与占比，同时揭示了不同政治体制下双重国籍接纳程度的差异。研究表明，当移民能够保留与来源国的法律联结时，他们更易获得目的国国籍，进而实现民主代表权。本数据集（GcDDCAD）面向公众免费开放，仅可用于非商业用途。需特别说明：本数据集不可用于判定单个个案的公民身份，此类场景建议咨询专业法律意见。若使用者引用本数据集，请务必标注文献来源：Vink M、Van der Baaren L、Reichel D（2025）《全球二元双重国籍接纳面板数据库》，刊载于《国际移民评论》（International Migration Review）。readme.txt文件将指导使用者如何利用本数据仓储库中的复现文件，复刻论文中报告的研究结果。