Distance between opening a digital payment account and using one – understanding what works to bridge the gap

India’s Unified Payments Interface (UPI) has transformed the way people make and receive payments. It now accounts for 85% of India’s digital payment transactions by volume (Press Information Bureau, 2026). But the rapid expansion of digital payments has not translated into equal use by women and men.

Co-producing evidence gap maps with IDB to strengthen an evidence-informed culture in Latin America and the Caribbean

Over the past year, 3ie and the Inter-American Development Bank (IDB), a founding partner of 3ie’s Global Evidence Commitment, co-produced two interactive evidence gap maps (EGMs): one on policing and citizen security, and one on transportation. Both are now publicly available, and their influence is already visible in how IDB teams design evaluations. This blog describes how that happened and what we learned along the way.

Preschool helped children in Mozambique. Do the benefits persist into adulthood?

Earlier this year, I returned to Mozambique to follow up on an impact evaluation that we started almost 20 years ago to measure the effects of community-based preschool. Then, we found that it helped the children who participated. Now, we’re working to see what happened to those same former preschoolers as they’ve grown into adults. Are they more educated than they would have been without access to preschool? Do they earn more? Are they healthier? Did their lives change in other ways?

Closing the loop: Bringing evaluation findings back to communities in Sierra Leone and Guinea

In far too many evaluations, the end of data collection is the last time that community members hear from the research team. Research participants generally don’t find out the results of the studies they participate in, a disconnect which has been cited as an ethical issue.

Asking the right question: evidence, method, and what the RCT debate is missing

The wrong fight: moving beyond the RCT wars toward rigorous learning

A response to Todd Moss and Dean Karlan

Todd Moss and Dean Karlan are relitigating a familiar argument. The short version is that Todd Moss recently argued that the evidence-for-development agenda has run its course, while Dean Karlan disagreed. 

Addressing irregular migration: Insights from 3ie’s latest evidence synthesis

3ie has updated its 2023 Evidence Gap Map (EGM) on interventions aiming to address the root causes and drivers of irregular migration. The updated map, released in early 2026, now covers 105 impact evaluations and seven systematic reviews (published till 2025) and tells a familiar story: a growing evidence base, but one that remains uneven and fragmented, with persistent gaps across key intervention areas. 

The missing middle: why connecting evidence systems to decision systems is key

The development sector has never had access to more evidence. Decades of impact evaluations, systematic reviews, evidence gap maps, and data systems have produced a substantial body of knowledge (see 3ie’s Development Evidence Portal) about what works, for whom, how, and under what conditions. And yet this evidence often fails to reach the decisions that matter most. Why?

Evidence in a fragmented world: some reflections

Aid has always been shaped by donor interests, but development cooperation is now becoming more overtly interest-driven. Can development outcomes survive inside that new framing? In this blog, I highlight three key points and two boldish ideas I covered in my remarks at the recently-held OECD Conference on the Future of Development Cooperation. 

In a world of tighter budgets, geopolitical competition, and mounting pressure to demonstrate results, evidence and learning become more important, not less. What changes is the urgency with which we must deploy them.

A lasting win against food insecurity

At the height of uncertainty, many families arriving in Colombia faced a daily question: Will we eat today?

For Marisol, a mother of three, food was never just about hunger. It was about responsibility. In the early months after migrating, stretching the household budget required constant calculation. “Sometimes I reduced my own portions so my children could eat,” she recalls.

Making AI work: Practical applications in impact evaluation

Generative AI is increasingly becoming a part of researchers’ and analysts’ toolkits and reshaping how we design and deliver our work. But what does this mean for the international development community, particularly evaluators?