Migrant children's well‐being has emerged into the spotlight of academic literature and policy‐makers in recent times. This systematic review is aimed at analysing the publication trends on the topic and at synthesising the available evidence on the antecedents of well‐being of first‐generation international migrant children. Systematic searches of primary studies were conducted in 18 databases using search terms related to migration, childhood and well‐being. Three rounds of screening and data extraction, researchers' full agreement and the inclusion criteria produced 39 eligible studies. Critical appraisal of results revealed a fragmentation in the literature, the evidence available being mostly descriptive and focused on involuntary migrants settled in Western countries. A bias across publications overlooking younger migrant children was unveiled. The compartmentalisation of the evidence hindered an understanding of the magnitude of the different effects of migration on well‐being. Antecedents of well‐being have been documented as factors fostering and hindering well‐being. Important gaps in literature and key antecedents of well‐being have been uncovered for voluntary and involuntary migrant children. These findings show limitations in the available evidence pointing to specific suggestions for future research that should help improve interventions at the social and individual levels.

This paper presents the Delphi methodology employed to select a final dashboard of 30 indicators on the socio-educative inclusion of refugee and migrant children in Europe. Firstly, a procedure for identifying Key Performance Indicators (KPIs) was carried out, including a specialized scientific literature review, the mapping of previous indicators, and qualitative workshops with key stakeholders at micro, meso, and macro levels in six countries. Then, a Delphi design was implemented to assess, rate, and provide meaningful qualitative improvements to a pool of pre-selected indicators. The Delphi methodology involved a group of international experts on the matters of inclusive education or migration, researchers, NGOs, and public officers. As an alternative to traditional "benchmark-based" consensus, we introduced the use of a) the CARA model and b) an alternative multi-input and mixed-method consensus-building procedure. The results provided a significant contribution to qualitative methods on the one hand and to migration and integration literature on the other. The methodological innovations, the diversity of experts' perspectives involved in the process, and the structured nature of the method constituted significant advantages to improve the robustness of the Delphi methodology for selecting and validating indicators. Future research involving a Delphi methodology can benefit from applying the present procedure.

This paper aims to explore the role of Child Well-Being (CWB) in the integration processes of migrant and refugee minors. Through the co-creative development of a new child-centered system of indicators about the integration of migrant and refugee children in Europe the authors discuss a) the prominent role of well-being in this set of indicators, and b) how reappraising these indicators from a well-being approach can contribute to delving into which aspects of CWB are connected to the integration of migrant children. The contributions of this paper open new research paths: on the one hand, the methodology presented provides a reference for future research that can replicate the procedure to build child-centered indicators in disciplines different than migration studies; on the other hand, the results presented suggest not only that well-being has a prominent role in migrant children integration experiences, but also, that reappraising dimensions of migrant children’s integration from a well-being approach hints at blurry borders between both concepts. This suggests promising research opportunities to underpin the relationship between integration and well-being.