Working Paper: NBER ID: w28950
Authors: Oleg Itskhoki; Dmitry Mukhin
Abstract: The Mussa (1986) puzzle is the observation of a sharp and simultaneous increase in the volatility of both nominal and real exchange rates following the end of the Bretton Woods System of pegged exchange rates in 1973. It is commonly viewed as a central piece of evidence in favor of monetary non-neutrality because it is an instance in which a change in the monetary regime caused a dramatic change in the equilibrium behavior of a real variable (the real exchange rate) and is often further interpreted as direct evidence in favor of models with nominal rigidities in price setting. This paper shows that the data do not support this latter conclusion because there was no simultaneous change in the properties of the other macro variables, nominal or real. We show that an extended set of Mussa facts equally falsifies both conventional flexible-price RBC models and sticky-price New Keynesian models as explanations for the Mussa puzzle. We present a resolution to the broader Mussa puzzle based on a model of segmented financial market — a particular type of financial friction by which the bulk of the nominal exchange rate risk is held by financial intermediaries and is not shared smoothly throughout the economy. We argue that rather than discriminating between models with sticky versus flexible prices, or monetary versus productivity shocks, the Mussa puzzle provides sharp evidence in favor of models with monetary non-neutrality arising in the financial market, suggesting the importance of monetary transmission via the risk premium channel.
Keywords: No keywords provided
JEL Codes: E30; E40; E50; F30; F40; G10
Edges that are evidenced by causal inference methods are in orange, and the rest are in light blue.
| Cause | Effect |
|---|---|
| end of the Bretton Woods system (F33) | increased volatility in nominal and real exchange rates (F31) |
| transition from pegged to floating exchange rates (F31) | significant increase in both nominal and real exchange rate volatility (F31) |
| increased nominal exchange rate volatility (F31) | no corresponding increase in the volatility of other macroeconomic variables (inflation, consumption, output) (E39) |
| lack of change in macroeconomic variables despite increased volatility in exchange rates (F31) | suggests a form of monetary neutrality (E49) |
| absence of volatility changes in macroeconomic variables other than the real exchange rate (E39) | undermines conventional flexible-price RBC models and sticky-price New Keynesian models (E12) |
| observed phenomena (C90) | provides compelling evidence in favor of alternative models that account for financial market frictions (G19) |