Citizen Science to Bridge Statistical Gaps

As large-scale demographic surveys decline worldwide, the challenge of producing reliable population statistics has become increasingly critical. A study co-authored by GSEM Professor François Grey, together with experts from the International Institute for Applied Systems Analysis (IIASA), the United Nations, and the global statistical community, calls for greater integration of citizen science to address this shortfall.

Since 1984, the Demographic and Health Survey (DHS) program has supported more than 90 countries in collecting essential health data. However, recent U.S. budget cuts have weakened this system, jeopardizing the monitoring of the United Nations Sustainable Development Goals (SDGs), particularly in low- and middle-income countries. Even European nations, despite higher budgets, are redirecting resources, increasing pressure on national statistical offices.

To meet this challenge, the study advocates for incorporating citizen science—data collection by volunteers and local communities—into official statistical systems. This approach could contribute to up to 60% of SDG indicators currently reliant on household surveys, with significant potential for SDG 3, “Good Health and Well-being.”

Professor Grey emphasizes: “The goal is not to replace traditional surveys entirely, but to adopt participatory approaches more systematically where they make sense.” He also highlights the leadership role of the University of Geneva: “We co-founded the Citizen Science Global Partnership, a worldwide network working closely with Geneva-based international organizations. In Switzerland, we established Citizen Science Connected with ETH Zurich and the University of Zurich to promote projects addressing sustainability challenges. For example, through the European ALBATROSS project, we collaborate with African partners to gather data on climate change and its impacts.”

The article outlines a roadmap for integrating citizen science into official systems, addressing key issues such as data quality, participation bias, and sustainable funding.

> Read the article published in the Nature Communications Sustainability: Why citizen science is now essential for official statistics

> Read the University of Geneva press release (In French)