For this EPD capstone project, SIPA partnered with the Global Reporting Initiative to explore a question whether sustainability reporting influences company behavior. Six students from SIPA conducted fieldwork in Lima, Peru to ascertain how sustainability reporting is conducted with regards to GRI's Sustainability Reporting Standards, and how the process influences business strategy and operations. The team created an impact assessment framework, derived from GRI's Theory of Change, exploring each of its impact areas and outlining relevant metrics, indicators and methods of verification. The team also recommended a supplemental framework to expand GRI's engagement with companies and its subsequent impact.