Quadratic Funding (QF) is a more democratic and scalable form of matching funding for public goods, i.e. any projects valuable to large groups of people and accessible to the general public.
“Matching funding” is a model of funding public goods where a fund from governments or philanthropic institutions matches individual contributions to a project. QF optimizes matching funds by prioritizing projects based on the number of people who contributed. This way, funds meant to benefit the public go towards projects that really benefit a broad public, instead of things that only have a few wealthy backers. In QF, [total funding] for a proposal is [the square root of each contribution to it → summed up, then squared.] QF strongly encourages people to make contributions, no matter how small, and ensures a democratic allocation of funds meant to benefit the public.