中國人民大學(xué)經(jīng)濟(jì)學(xué)院劉哲希在經(jīng)濟(jì)學(xué)院進(jìn)行了一場題為長期停滯的范例的講座，講座的主要內(nèi)容是：

　　我們提出了一個(gè)世代交疊新凱恩斯模型，其中一個(gè)永久(或很執(zhí)著)暴跌有可能沒有任何自我修正力量充分就業(yè)。觸發(fā)的暴跌是一個(gè)去杠桿化的沖擊，這就造成儲(chǔ)蓄供過于求。在同一個(gè)方向工作，并能夠創(chuàng)建或加劇這一問題的其他力包括人口增長的下降，增加收入差別，并且在投資的相對價(jià)格的下降。我們的模型闡明了日本的危機(jī)，大蕭條，而復(fù)蘇緩慢走出大蕭條的長期持續(xù)性。它也強(qiáng)調(diào)了政策的多重影響。

　　原文：We propose an overlapping generations New Keynesian model in which a permanent (or very persistent) slump is possible without any self-correcting force to full employment. The trigger for the slump is a deleveraging shock, which creates an oversupply of savings. Other forces that work in the same direction and can both create or exacerbate the problem include a drop in population growth, an increase in income inequality, and a fall in the relative price of investment. Our model sheds light on the long persistence of the Japanese crisis, the Great Depression, and the slow recovery out of the Great Recession. It also highlights several implications for policy.