What is public interest technology? An expert on data and policy explains how it helps people in need

Public interest technology is the practice of using data, design, and engineering to close the gap between what government programs promise and what people actually experience. As Carnegie Mellon professor Rayid Ghani explains in The Conversation, millions of people who qualify for food assistance never receive it, often because they don't know the program exists or the application is too complicated. The field has already produced real results: a data-driven system in Chicago flags high-risk housing units for lead inspections before a child gets poisoned, rather than waiting for a positive blood test. Allegheny County, Pennsylvania, uses machine learning to direct limited eviction assistance to the residents most likely to become homeless. And Johnson County, Kansas, linked its jail, emergency medical, and mental health systems to reach people before their next arrest. New York City recently launched a Public Interest Technology Crew, embedding tech specialists in city agencies to solve resident problems. Ghani says what makes technology serve the public interest comes down to choices: who helps build it, how success is defined, and who's accountable when things go wrong.

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