Introduction – Ten long years of crisis

[eng] The crisis celebrates its tenth anniversary, offering economists a lesson in modesty and a great opportunity to take a new look at their understanding of the world. The effect of a zero lower bound on interest rates on the efficiency of economic policies, the Keynesian multiplier measure, the issue of the growth slowdown being a cause or consequence of the crisis, the effect of rising uncertainties on households’ and firms’ behaviour, the effectiveness of macro-prudential stabilisation, the impact of inequalities on the functioning of the credit market, the way in which the coordination of macro-economic policies in Europe is designed and promoted : all these crucial questions are part of the economists’ research programme, and this special issue offers a rich review of the progress already achieved.