Policy influence There are over 1000 think tanks in the US. Most raise their funds from government contracts or private donations. On the other hand, they tend to be leery of taking money from corporations or foreign governments.
根據統計，美國智庫總數超過一千個，資金來源多為政府機構或民間贊助，但對企業及外國政府捐助自律甚嚴。