Tsai Feng-ming points out that when the two Germanies were frozen in the Cold War, West Berlin was isolated within East Germany. Even though the West German government gave special treatment to the residents of West Berlin-- such as tax breaks, subsidized rents and draft exemptions--it was still unable to stem the flow of those leaving the city for other West German cities.
據蔡豐名指出，兩德冷戰期間，位在東德境內的西柏林儼然一座孤城，儘管西德政府給予西柏林居民種種優惠，像減稅、房租津貼、解除徵兵制等等，還是無法阻止當地居民外遷到其他西德境內的城市。