Better evidence for better decisions
Limestone Vision and Mission
March 17, 2026
Development programs often combine multiple interventions, making it difficult to know which components drive results. Our recent paper shows how evaluators can use real-world variation in program implementation to estimate the added value of individual components, even when programs were not designed as randomized experiments. Applying this approach to a Girls’ Education Challenge program in Zimbabwe, we find that providing bicycles improved attendance and girls’ empowerment but did not increase short-term learning outcomes. More broadly, the analysis illustrates how organizations can extract credible insights about program components from existing project data.
read more
April 2, 2025
We are thrilled to announce the publication of the Unified Cost-Benefit Analysis (UCBA) Guidelines, a landmark document developed to standardize how cost-effectiveness and cost-benefit analyses (CEAs and CBAs) are documented and presented. Prepared by Limestone Analytics and led by Bahman Kashi and Rachel Bahn, this comprehensive guide aims to make CEAs and CBAs more accessible, reliable, and impactful for decision-makers across sectors.
read more
March 13, 2024
The combined application of ex-ante and ex-post impact analyses for the same investment mitigates the friction typically associated with solely applying ex-post impact analysis. This multi-pronged approach will also yield the most comprehensive process for generating a pipeline of research questions to shape right-fit ex-post studies.
read more
