A curated collection of research, frameworks, and tools — organized by topic and mapped to The Impact Thesis Blueprint.
Measurement is where impact investing either earns its credibility or loses it. The ability to quantify societal returns with the same rigor applied to financial returns is the defining challenge of the field.
The measurement landscape is both rich and fragmented. Organizations like the Global Impact Investing Network have developed IRIS+, a system of standardized metrics organized by impact category and aligned to the Sustainable Development Goals. The Impact Management Platform provides a shared vocabulary for describing impact across the dimensions of what, who, how much, contribution, and risk. Impact Frontiers has advanced the concept of the Efficient Impact Frontier, which applies portfolio theory logic to impact optimization.
These frameworks are not competitors — they are layers of an evolving infrastructure. IRIS+ provides the metrics. The Impact Management Platform provides the conceptual framework. Impact Frontiers provides the portfolio-level analytical lens. Together, they represent the current state of the art in impact measurement.
Impact IRR, published in The Journal of Impact and ESG Investing, contributes to this infrastructure by adapting Internal Rate of Return to measure societal returns. It is one approach within a broader ecosystem of methodologies, each addressing different dimensions of the measurement challenge.
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