Determination of biaxial creep strength of T-111 tantalum alloy Semiannual report, Mar. 8 - Sep. 8, 1967

Creep behavior of T-111 alloy tubing under biaxial stress and stress effects on corrosion behavior of T-111 alloy with potassiu

Expenditure switching vs. real exchange rate stabilization: competing objectives for exchange rate policy

This paper develops a view of exchange rate policy as a trade-off between the desire to smooth fluctuations in real exchange rates so as to reduce distortions in consumption allocations, and the need to allow flexibility in the nominal exchange rate so as to facilitate terms of trade adjustment. We show that optimal nominal exchange rate volatility will reflect these competing objectives. The key determinants of how much the exchange rate should respond to shocks will depend on the extent and source of price stickiness, as well as the elasticity of substitution between home and foreign goods. Quantitatively, we find the optimal exchange rate volatility should be significantly less than would be inferred based solely on terms of trade considerations. Moreover, we find that the relationship between price stickiness and optimal exchange rate volatility may be non-monotonic. JEL Classification: F41, E52Exchange Rates, expenditure switching, monetary policy

Expectations and Exchange Rate Policy

Both empirical evidence and theoretical discussion have long emphasized the impact of %u201Cnews%u201D on exchange rates. In most exchange rate models, the exchange rate acts as an asset price, and as such responds to news about future returns on assets. But the exchange rate also plays a role in determining the relative price of non-durable goods when nominal goods prices are sticky. In this paper we argue that these two roles may conflict with one another. If news about future asset returns causes movements in current exchange rates, then when nominal prices are slow to adjust, this may cause changes in current relative goods prices that have no efficiency rationale. In this sense, anticipations of future shocks to fundamentals can cause current exchange rate misalignments. Friedman%u2019s (1953) case for unfettered flexible exchange rates is overturned when exchange rates are asset prices. We outline a series of models in which an optimal policy eliminates the effects of news on exchange rates.

Endogenous Currency of Price Setting in a Dynamic Open Economy Model

Many papers in the recent literature in open economy macroeconomics make different assumptions about the currency in which firms set their export prices when nominal prices must be pre-set. But to date, all of these studies take the currency of price setting as exogenous. This paper sets up a simple two-country general equilibrium model in which exporting firms can choose the currency in which they set prices for sales to foreign markets. We make two alternative assumptions about the structure of international financial markets: one where there are complete markets for hedging consumption risk internationally, and the other without risk-sharing possibilities. Our results are quite sharp: exporters will generally wish to set prices in the currency of the country that has the most stable monetary policy. When monetary stability is similar among countries, there is an equilibrium where firms from all countries set their price in the currency of the buyer (local currency pricing). But except for a special case where money variances are exactly identical across countries, there is no equilibrium where all firms set export prices in their own currencies (producer currency pricing).

The Optimal Choice of Exchange-Rate Regime: Price-Setting Rules and Internationalized Production

We investigate the choice of exchange-rate regime fixed or floating in a dynamic, intertemporal general equilibrium framework. Our framework extends Devereux and Engel (1998) by investigating the implications of internationalized production. We examine the role of price-setting -- whether prices are set in the currency of producers or the currency of consumers in determining the optimality of exchange-rate regimes in an environment of uncertainty created by monetary shocks. We find that when prices are set in producers' currencies, floating exchange rates are preferred when the country is large enough, or not too risk averse. On the other hand, floating exchange rates are always preferred when prices are set in consumers' currencies because floating exchange rates allow domestic consumption to be insulated from foreign monetary shocks. The gains from floating exchange rates are greater when there is internationalized production in this case.

Exchange Rate Pass-Through, Exchange Rate Volatility, and Exchange Rate Disconnect

This paper explores the hypothesis that high volatility of real and nominal exchange rates may be due to the fact that local currency pricing eliminates the pass-through from changes in exchange rates to consumer prices. Exchange rates may be highly volatile because in a sense they have little effect on macroeconomic variables. The paper shows the ingredients necessary to construct such an explanation for exchange rate volatility. In addition to the presence of local currency pricing, we need a) incomplete international financial markets, b) a structure of international pricing and product distribution such that wealth effects of exchange rate changes are minimized, and c) stochastic deviations from uncovered interest rate parity. Together, it is shown that these elements can produce exchange rate volatility that is much higher than shocks to economic fundamentals, and `disconnected' from the rest of the economy in the sense that the volatility of all other macroeconomic aggregates are of the same order as that of fundamentals.

Spin-selective localization due to intrinsic spin-orbit coupling

We study spin-dependent diffusive transport in the presence of a tunable spin-orbit (SO) interaction in a two-dimensional electron system. The spin precession of an electron in the SO coupling field is expressed in terms of a covariant curvature, affecting the quantum interference between different electronic trajectories. Controlling this curvature field by modulating the SO coupling strength and its gradients by, e.g., electric or elastic means, opens intriguing possibilities for exploring spin-selective localization physics. In particular, applying a weak magnetic field allows the control of the electron localization independently for two spin directions, with the spin-quantization axis that could be "engineered" by appropriate SO interaction gradients.Comment: 7 pages, 1 figur

Exchange Rate Pass-Through and the Welfare Effects of the Euro

This paper explores the implications of the European single currency within a simple sticky price intertemporal model. The main issue we focus on is how the euro may alter the responsiveness of consumer prices to exchange rate changes. Our central conjectures is that the acceptance of the euro will lead European prices to become more insulated from exchange-rate volatility, much the way U.S. consumer prices already are. We show that this has profound consequences for both the volatility and levels of macroeconomic aggregates in both the U.S. and Europe. We find that European welfare is enhanced, and, more surprisingly U.S. shares in Europe's good fortune. Alternative assumptions about how pricing behavior will change lead to different conclusions, but in all cases we can derive specific implications for expected levels and volatility of macroeconomic varialbes.