The procurement (6 lots) will implement the Preparatory Action (PA "New methodologies to assess inequality"). It will provide the necessary support to develop and measure inequality. In particular, it will support the integration of advanced analytical techniques - such as Big Data analytics, Natural Language Processing, and non-linear econometric models - as well as new modelling strategies-such as HANK, OLG models—applied to alternative data sources including administrative, text and survey data.