Speculative Attack and the External Constraint in a Maximizing Model of the Balance of Payments
This paper analyzes inevitable transitions between fixed and floating exchange-rate regimes in a balance-of-payments model where individual preferences are explicitly specified. The goal is to assessthe analogy between speculative attacks in foreign exchange markets and attacks on official price-fixing schemes in natural resource markets. In discrete time the analogy with resource markets is only partially correct, for in a deterministic model the collapse of a fixed rate may be characterized by two, successive attacks. The two-attack equilibriumis peculiar to discrete-time analysis, however. In the continuous-time limit of discrete-time models there is a single attack timed so as to rule out an anticipated discrete jump in the exchange rate.Balance-of-payments models differ from nonrenewable resource models in that foreign exchange reserves may be borrowed from abroad.The paper therefore asks whether there are limits to central-bank borrowing possibilities. In an idealized world where all private incomeis subject to lump-sum taxation, central-bank reserves can become infinitely negative with no violation of the public sector's intertemporal budget constraint. Nonetheless, a growth rate of domestic credit exceeding the world interest rate, if maintained indefinitely, leads to violation of the constraint in the paper's model.
|Date of creation:||Aug 1984|
|Date of revision:|
|Publication status:||published as "Speculative Attack and the External Constraint in a Maximizing Model ofthe Balance of Payments." From Canadian Journal of Economics, Vol. 19, No. 1, pp. 1-22, (February 1986).|
|Contact details of provider:|| Postal: National Bureau of Economic Research, 1050 Massachusetts Avenue Cambridge, MA 02138, U.S.A.|
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