PhD students in WDAqua will spend 3 years working at one of 6 research institutions in Europe (France, Germany, Greece, UK), will participate in an outstanding web science and data science training programme, and will have the chance to visit other of these organisations plus further application partners. The gross monthly salary (including social security, before taxes) is 3,110 € (adjusted depending on the country of employment) plus a mobility allowance of 600 €/month and, if applicable, a family allowance of 500 €/month.