Economist Marietta has more than 30 years of experience in conducting European comparative studies in the field of housing and has more than a decade of teaching experience at TU Delft.

Marietta is interested in financial and economic aspects of housing, including topics as the affordability and sustainability of housing costs, housing precarity, housing tenures, and housing policy. 

Recent International Projects

2025 Housing system challenges of young people in Germany and Australia, led by Jack Hewton (Curtin University, Perth), with Professor Rachel Ong ViforJ, Paul Vivian. This largely quantitative project aims to analyze the housing tenure pathways of young people in light of housing outcomes and tenure security.

2024-2026 Precarious housing, housing assistance and wellbeing, led by Professor Rachel Ong ViforJ (Curtin University, Perth); with Professor Wendy Stone and Professor Alfred Dockery. This project aims to develop a contemporary conceptualisation of housing precariousness as a multidimensional experience that exists in potentially variable ways for renters, owners and the marginally housed. Using mixed methods and cross-country analyses, the project expects to produce new evidence on pathways in and out of precariousness, as well as the coping strategies and wellbeing of the precariously housed. This is expected to offer major benefits by informing housing assistance policies that promote the wellbeing of Australians.

2020-2024 RE-DWELL Delivering Affordable and Sustainable Housing in Europe, Marie Curie Innovative Action (MSCA) Innovative Training Network (ITN), [MSCA-ITN grant agreement no. 956082]  https://www.re-dwell.eu/

2014-2019 RE-InVEST Rebuilding an inclusive, value-based Europe of solidarity and trust through social Investments, HORIZON 2020 project [proposal number 649447]

Recent appointments

• Encyclopedia for Housing and Home, Editor, section Housing Policy, 2nd Edition (2025-)
• UN-Habitat World Cities Report 2026, Global Housing Crisis, International Advisory Board (2025-2026)
• International Journal of Housing Policy, Management Board, (2024-)
• MSc Metropolitan Analysis, Design, and Engineering (MADE) Thesis Assessment Committee (2025-)
• MSc MADE Examining Board Member and Secretary (2023-2025)
• Critical Housing Analysis, Editorial Board (2021-)
• Land and Housing Law series, Elgar Publishing, Series Editor (2018-)
• Housing Policies in the EU, granted by Federal Institute for Research on Building, Urban Affairs and Spatial Development (BBSR) and the Federal Ministry of the Interior, Building and Community (BMI) in preparation for Germany as EC Chair in 2020; International Advisory Board 
• Ruimte en Wonen, Editorial Board (2017-2025).  

Marietta has also been member of the Management Board of Housing Studies (2007-2014), of which Editor-in-Chief (2019-2013) and fullfills/fulfilled various others roles at journals, such as at the Journal of Housing and the Built Environment. She was also Coordination Committee member of the European Network for Housing Research (ENHR) (2018-2022).