TY - JOUR AU - Aizenman,Joshua TI - Hoarding International Reserves Versus a Pigovian Tax-Cum-Subsidy Scheme: Reflections on the Deleveraging Crisis of 2008-9, and a Cost Benefit Analysis JF - National Bureau of Economic Research Working Paper Series VL - No. 15484 PY - 2009 Y2 - November 2009 UR - http://www.nber.org/papers/w15484 L1 - http://www.nber.org/papers/w15484.pdf N1 - Author contact info: Joshua Aizenman Department of Economics; E2 1156 High St. University of California, Santa Cruz Santa Cruz, CA 95064 Tel: 831/459-4791 Fax: 831/459-5077 E-Mail: jaizen@ucsc.edu AB - We outline the case for supporting self-insurance by imposing a tax on external borrowing in a model of an emerging market. Entrepreneurs finance tangible investments via bank intermediation of foreign borrowing, exposing the economy to negative fire-sale externalities at times of deleveraging; a risk that increases with the ratio of aggregate external borrowing to international reserves. Price taking economic agents ignore their marginal impact on the expected cost of a deleveraging crisis. The optimal borrowing tax reduces the distorted activity, external borrowing, and induces borrowers to co-finance the precautionary hoarding of international reserves. ER -