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The Institution

The Federal Planning Bureau (FPB) is an independent public agency. It draws up studies and projections on economic, social and environmental policy issues and on the integration of these policies within a context of sustainable development.

Gijs Dekkers

Gijsbrecht ‘Gijs’ Dekkers has been working at the FPB since 1999. Within the team ‘Social protection, demography and prospective studies’, he is responsible for developing, using and managing the dynamic microsimulation model MIDAS. This model is used to simulate information on the potential impact of ageing, tax and social policy on the projected development in the adequacy of statutory pensions. The results are notably used in the reports published by the Study Committee on Ageing.

In addition, Gijs is in charge of various research projects. First of all, he is the promoter of the MIMBEL project, a research project that is run jointly by the FPB and the CES (University KU Leuven) and financed by BELSPO and the FPS Social Security. This project aims to assert whether and how immigration impacts statutory pensions’ adequacy. Within the framework of the project, an immigration module and a labour supply equation (Dagsvik-Aaberge) were integrated in the MIDAS model.

Gijs is also finalizing and valorizing several projects of which he was the promoter, the most important one being the progress project MiDaL, a project run jointly by the FPB and CEPS/INSTEAD and IGSS (the two latter both based in Luxembourg). This project has led, among other things, to the development of an instrument for developing dynamic microsimulation models, LIAM2. A second project consists of exporting MIDAS to Luxembourg so it can serve as a basis for the country’s own model.

Finally, Gijs is in charge of a project aimed at exporting MIDAS to Hungary, allowing this and possibly other countries to build their own national models, like in Luxembourg.




  • Social protection, demography and prospective studies

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