The 2016 report titled ‘WAVE Mapping – Administrative Data Collection by Women’s Support Services in Europe: National Women’s Helplines, Women’s Shelters, and Women’s Centers’ explores the situation of data collection in specialist women’s support services in Europe with the aim to map existing data collection methods and systems in Europe (in the European Union and other European countries). This study resulting in the report is situated within a greater European landscape of focus on improving the availability and quality of administrative data collection, and supports Article 11 of the Istanbul Convention, which mandates state parties to “collect disaggregated relevant statistical data at regular intervals.”