Bank nationalization—the topic du jour in Washington and on Wall Street—means different things to different people. Although nationalization is a serious and extreme step with high social and financial costs, Douglas Elliott believes full nationalization may be needed only as a last resort for one or two of the nation’s larger banks, with more widespread nationalization unlikely. But, he says, it may make sense for the government to partially nationalize additional large banks now, in an effort to bring some certainty to the markets.