Look at foreign policy, the area of most concern to people in Taiwan and mainland China. Although think tanks are at the outermost fringe of the US policy-making ring, with far less influence than the White House or Congress, individuals move between think tanks and government positions with each change of administration as if through a revolving door.
以兩岸最為關注的外交政策領域為例，雖然美國智庫在決策「同心圓」中處於最外層，影響力不如總統、內閣、及國會議員來得直接，但學者在智庫與政務官間的流動，就在每次政黨輪替間如旋轉門般進進出出。