Lenkowsky, Leslie2018-07-112018-07-112018https://hdl.handle.net/1805/16662Americans generally have a considerable degree of freedom in forming POs, including Constitutional protection of “freedom of association.” People wishing to act collectively do not need to obtain legal recognition in advance, and hundreds of thousands of such “informal” groups are estimated to exist. Anyone can found one.en-USCountry ReportPhilanthropyUnited StatesDataset