The Micro-foundations of Big Mac Real Exchange Rates

The real exchange rate is said to be the single most important price in an economy. While we used to think that we knew what explained its movements (e.g., the Balassa-Samuelson effect), the recent much-cited result by Engel (1999) proposes a serious reinterpretation – i.e., nearly 100% of the movements in the U.S. real exchange rate are explained by deviations from the law of one price. Engel’s finding holds even in the medium run, when movements in the relative price of non-tradables between countries, were thought to be of paramount importance. In this project, we study the movement of real exchange rates based on the prices of Big Macs (which we show are highly correlated with the CPIbased real exchange rates). Our main innovation is to match these prices to the prices of individual ingredients (ground beef, bread, lettuce, labor cost, rent, etc.) in 34 countries during 1990–2002. There are a number of advantages associated with our approach. First, unlike the CPI real exchange rate, we can measure the Big Mac real exchange rate in levels in an economically meaningful way. Second, unlike the CPI real exchange rate for which the attribution to tradable and non-tradable components involves assumptions on the weights and the functional form, we (almost) know the exact composition of a Big Mac, and can estimate the tradable and non-tradable components relatively precisely. Third, we can study the dynamics of the real exchange rate in a setting that is free of the productaggregation bias (argued by Imbs, Mumtaz, Ravn, and Rey, 2002, to be important in studies on CPI real exchange rates), the temporal aggregation bias (argued to be important by Taylor, 2001), or the bias generated by non-compatible consumption baskets across countries. Fourth, we show that Engel's result that deviation from the law of one price is all that matters does not hold generally. Furthermore, deviations from his result can be systematically explained.Real exchange rates; TAR models

Border, Border, Wide and Far, How We Wonder What You Are

This paper exploits a three-dimensional panel data set of prices on 27 traded goods, over 88 quarters, across 96 cities in the U.S. and Japan. We present evidence that the distribution of intra-national real exchange rates is substantially less volatile and on average closer to zero, than the comparable distribution for international relative prices. We also show that an equally-weighted average of good-level real exchange rates tracks the nominal exchange rate well, suggesting strong evidence of sticky prices. We turn next to economic explanations for the dynamics of this so-called "Border" effect. Focusing on dispersion in prices between city pairs, we confirm previous findings that crossing national borders adds significantly to price dispersion. Using our point estimates crossing the U.S.-Japan "Border" is equivalent to adding between 2.5 and 13 million miles to the cross-country volatility of relative prices. We make a direct and explicit inference on the influence of shipping costs, distance, exchange rate and relative wage variability on the "Border" effect. In our calculations, the "Border" effect disappears after controlling for these additional variables.

Insignificant and Inconsequential Hysteresis: The Case of the U.S. Bilateral Trade

This paper casts doubt on the validity of the hysteresis hypothesis as an explanation of the persistent U.S. trade deficits in the 1980s. We propose two tests to investigate two different implications of the hypothesis. The first implication is that cumulative changes in exchange rates, in addition to current exchange rate levels, are important determinants of trade flows. The second implication is that foreign exporting firms' perceptions of exchange rate volatility will affect their decisions to enter or exit the market. We find little support for either aspect of the hysteresis hypothesis.

Slow Passthrough Around the World: A New Import for Developing Countries?

Developing countries traditionally exhibit passthrough of exchange rate changes that is greater and more rapid than high-income countries, but have experienced a rapid downward trend in recent years in the degree of short-run passthrough, and in the adjustment speed. As a consequence, slow and incomplete passthrough is no longer exclusively a luxury of industrial countries. Using a new data set -- prices of eight narrowly defined brand commodities, observed in 76 countries -- we find empirical support for some of the factors that have been hypothesized in the literature, but not for others. Significant determinants of the passthrough coefficient include per capita incomes, bilateral distance, tariffs, country size, wages, long-term inflation, and long-term exchange rate variability. Some of these factors changed during the 1990s. Part (and only part) of the downward trend in passthrough to imported goods prices, and in turn to competitors' prices and the CPI, can be explained by changes in the monetary environment. Real wages also work to reduce passthrough to competitors' prices and the CPI, confirming the hypothesized role of distribution and retail costs in pricing to market. Rising distribution costs, due perhaps to the Balassa-Samuelson-Baumol effect, could contribute to the decline in the passthrough coefficient in some developing countries.

Explaining the Border Effect: The Role of Exchange Rate Variability, Shipping Costs, and Geography

This paper exploits a three-dimensional panel data set of prices on 27 traded goods, over 88 quarters, across 96 cities in the U.S. and Japan. We show that a simple average of good-level real exchange rates tracks the nominal exchange rate well, suggesting strong evidence of sticky prices. Focusing on dispersion in prices between city-pairs, we find that crossing the U.S.-Japan Border' is equivalent to adding as much as 43,000 trillion miles to the cross-country volatility of relative prices. We turn next to economic explanations for this so-called border effect and to its dynamics. Distance, unit-shipping costs, and exchange rate variability, collectively, explain a substantial portion of the observed international market segmentation. Relative wage variability, on the other hand, has little independent impact on segmentation.

Purchasing Power Disparity During the Floating Rate Period: Exchange Rate Volatility, Trade Barriers and Other Culprits

Using a panel of 12 tradable sectors in 91 OECD country pairs (14 countries), we study the deviations from the purchasing power parity during the recent floating exchange rate period. (1) We find some evidence that the deviations are positively related to exchange rate volatility as well as to transportation costs. (2) Once we have controlled for these two factors, free trade areas such as the EC and the EFTA do not seem to reduce significantly the deviations from PPP relative to other OECD countries. (3) Although only using the post- 1973 data, we are able to find strong evidence of mean reversion towards PPP. The estimated half lives of the deviation from PPP are about four years and three quarters for the non-EMS countries in the sample, and four years and one quarter for the EMS countries. (4) We find evidence of non-linearity in the rate of mean reversion: the convergence occurs faster for country pairs with larger initial deviations.