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Abstract:
The real exchange rate - real interest rate (RERI) relationship is central to most open economy macroeconomic models. However, empirical support for the relationship, especially when cointegration-based methods are used, is rather weak. In this paper we reinvestigate the RERI relationship using bilateral real exchange rate data spanning the period 1978 to 1997. We first clarify the logic of applying cointegration methods to the RERI and propose an alternative way of testing the relationship. We demonstrate that the failure of earlier analyses to detect a stationary real interest rate is largely due to the low power of the tests employed.

Real Exchange Rates, Real Interest Rates, Cointegration

Abstract:
We explore the impact of mortgage securitization on the international diversification of macroeconomic risk. By making mortgage-related risks internationally tradeable, securitization contributes considerably to better international consumption risk sharing: we find that countries with the most highly developed markets for securitized mortgage debt have consumption responses to a typical idiosyncratic business cycle shock that are 20-30 percent less volatile than those experienced by countries that do not allow for mortgage securitization. Our results are based on quarterly data from a panel of 16 industrialized countries and cover the sample period 1971-2008 Q1. They are robust to a range of controls for other aspects of financial globalization, international differences in the structure of housing markets and the financial system etc. Against the backdrop of the subprime crisis, these findings inevitably raise the question whether securitization could not just facilitate risk sharing in tranquil times but that it actually fails to provide international insurance in severe crisis periods. Indeed, we find that international risk sharing decreases in global asset price downturns and increases in booms. But we do not find evidence that countries with more developed securitization markets are systematically more exposed to these fluctuations in the extent to which risk can be shared across national boundaries.

Financial globalization, international risk sharing, home bias, securitization, mortgage markets, asset prices, international business cycles

Abstract:
We explore the impact of mortgage securitization on the international diversification of macroeconomic risk. By making mortgage-related risks internationally tradeable, securitization contributes considerably to better international consumption risk sharing: we find that countries with the most highly developed markets for securitized mortgage debt have consumption responses to a typical idiosyncratic business cycle shock that are 20-30 percent less volatile than those experienced by countries that do not allow for mortgage securitization. Our results are based on quarterly data from a panel of 16 industrialized countries and cover the sample period 1985-2008Q1. They are robust to a range of controls for other aspects of financial globalization, international differences in the structure of housing markets and the financial system etc. Against the backdrop of the subprime crisis, these findings inevitably raise the question whether securitization could not just facilitate risk sharing in tranquil times but that it actually fails to provide international insurance in severe crisis periods. Indeed, we find that international risk sharing decreases in global asset price downturns and increases in booms. But we do not find evidence that countries with more developed securitization markets are systematically more exposed to these fluctuations in the extent to which risk can be shared across national boundaries.

financial globalization, international risk sharing, home bias, securitization, mortgage markets, asset prices, international business cycles

Abstract:
Strongly periodic series occur frequently in many disciplines. This paper reviews one specific approach to analyzing such series viz. the harmonic regression approach. In this paper the five major methods suggested under this approach are critically reviewed and compared, and their empirical potential highlighted via two applications. The out-of-sample forecast comparisons are made using the Superior Predictive Ability test, which specifically guards against the perils of data snooping. Certain tentative conclusions are drawn regarding the relative forecasting ability of the different methods.

mixed spectrum, autoregressive methods, eigenvalue methods, dynamic harmonic regression, data snooping: multiple forecast comparisons

Abstract:
We investigate empirically how industrialized countries and U.S. states share consumption risk at horizons between one and thirty years. U.S. federal states share about 50 percent of their permanent idiosyncratic risk through cross-state capital income flows. While insurance against transitory fluctuations in output is virtually complete, OECD countries do not share any of their permanent idiosyncratic risk. Our results suggest that purely transaction cost based theories cannot explain the home bias, since the potential welfare gains from insurance against permanent shocks would by far outweigh that of insuring against transitory variation. We conclude that permanent and transitory shocks constitute two qualitatively different kinds of risk and that various forms of endogenous market incompleteness may render permanent shocks a lot harder to insure, in particular at the international level.

consumption risk sharing, home bias, international business cycles, panel vector

Abstract:
We estimate Shiller portfolio weights for OECD countries and US states. We find that the income of US federal states is derived to about 50 percent from own output, that of OECD countries to about 60 percent.This suggests that US states display considerable 'home bias at home' and that the international portfolio home bias may be relatively less severe than evidence based on models of optimal portfolio allocation would suggest. We relate the estimated portfolio weights to the structure of regional and international business cycles. In particular, we can reproduce the empirical evidence on inter-state and international income flows.

Consumption Risk Sharing, International and regional business cycles, Capital flows, Home Bias, Non-stationary panel data

Abstract:
This paper studies the long-run relationship between consumption, asset wealth and income in Germany, based on data from 1980 to 2003. While earlier studies - mostly for the Anglo-Saxon economies - have generally documented that departures of these three variables from their common trend signal changes in asset prices, we find that for Germany they predict changes in income. Asset price changes are found to have virtually no effect on consumption - both in the short as well as in the long-run. We offer an explanation of this finding that emphasizes differences between the bank-based German financial system and the rather market-based Anglo-American system: stock ownership by private households is much less widespread in Germany than in the Anglo-Saxon economies and the share of publicly traded equity in household wealth is much smaller in Germany than in the U.S., the UK or Australia.

wealth effect on consumption, business cycles, monetary policy transmission, financial systems, asset price predictability, permanent income hypothesis

Abstract:
Idiosyncratic consumption risk explains more than 60 percent of the cross-sectional variation in quarterly exchange rate changes and currency returns. Our results are obtained from data of 13 industrialized countries and are based on an international version of the consumption capital asset pricing model (CCAPM) in which we account for international consumption heterogeneity. We use this framework to dissect the consumption-exchange rate anomaly, the empirical fact that international variation in purchasing power alone does not appear to account for differences in consumption growth rates across countries. As an explanation for this phenomenon, we explore the presence of currency risk premia that also lead to departures from uncovered interest parity (UIP). We decompose the cross-sectional variation in consumption into one component that is due to cross-country differences in inflation rates and a second component that is due to international variation in nominal interest rates. We interpret these factors as indicators of goods and financial market segmentation respectively. We find that both help account to virtually equal parts for the cross-section of exchange rate changes. Interestingly, the price of aggregate consumption risk has declined over the 1990s, in line with a growing literature that documents a growing internationalisation of country portfolios over this period.

Uncovered interest rate parity, consumption CAPM, international financial integration, consumption risk sharing

Abstract:
This paper documents a marked increase in international consumption risk sharing throughout the recent globalization period. Unlike earlier studies that have found it difficult to document a consistent effect of financial globalization on international consumption comovements, we make use of the information implicit in the relative levels of consumption and output to measure long-run risk sharing among OECD countries and US federal states.

We derive our empirical setup from a deliberately simplistic model in which countries can trade perpetual claims to each other's output (Shiller securities). Our framework allows us to distinguish between two channels of risk sharing: ex ante diversification that leads to income smoothing through capital income flows and ex-post consumption smoothing through savings and dissavings. The model successfully replicates the patterns of income and consumption smoothing observed in both U.S. state-level and international data. The increase in international consumption risk sharing is closely associated with the decline in international portfolio home bias. While capital income flows remain relatively limited as a channel of risk sharing at business cycle frequencies, we find that better international portfolio diversification has led to a considerable increase in capital income flows at medium and long horizons.

Consumption Risk Sharing, International and regional business cycles, Capital flows, Home Bias, Non-stationary panel data

Abstract:
This paper documents a marked increase in international consumption risk sharing throughout the recent globalization period. Unlike earlier studies that have found it difficult to document a consistent effect of financial globalization on international consumption comovements, we make use of the information implicit in the relative levels of consumption and output to measure long-run risk sharing among OECD countries and US federal states. We derive our empirical setup from a deliberately simplistic model in which countries can trade perpetual claims to each other's output (Shiller securities). This model allows us to identify the channels through which improvements in international risk sharing have come about. The model predicts crosscountry and cross-regional income flows with considerable precision. Both international income flows as well as consumption risk sharing have increased since 1990, in line with the gradual removal of country portfolio home bias documented elsewhere. Still, the increase in international income flows falls short of explaining all of the consumption risk sharing we see in international data. We show that heterogeneity in countries' gross foreign asset positions is important in explaining this result. While countries with less portfolio home bias enjoy better consumption risk sharing, our findings also suggest that heterogeneity in country portfolios opens a separate channel for consumption risk sharing, possibly through asymmetric valuation effects that have been emphasized in the recent literature.

Consumption risk sharing, international and regional business cycles, home bias, non-stationary panel data

Abstract:
In spite of two decades of financial globalization, consumption-based indicators do not seem to signal more international risk sharing. We argue that consumption risk sharing among industrialised countries has actually increased - in particular since the 1990s - but that standard consumption-based measures of risk sharing - such as the volatility of consumption conditional on output or international consumption correlations - have been unable to detect this increase. The reason is that consumption has also been affected by the concurrent decline in the volatility of output growth in most industrialised countries since the 1980s. As a first important driver of this decline we identify a more gradual response of output to permanent idiosyncratic shocks. Since consumption reacts mainly to permanent shocks, it appears more volatile in relation to current changes in output. This effect seems to have offset the tendency of financial globalization to lower the volatility of consumption conditional on output. Secondly, because the variability of permanent global shocks has also fallen, international consumption correlations have also generally not increased as financial markets have become more integrated.

Consumption Risk Sharing, International Business Cycles, Great Moderation, Financial Integration and Capital Flows, Home Bias

Abstract:
Small businesses tend to be owned by wealthy households. Such entrepreneur households also own a large share of U.S. stock market wealth. Fluctuations in entrepreneurs' hunger for risk could therefore help explain time variation in the equity premium. The paper suggests an entrepreneurial distress factor that is based on a cointegrating relationship between consumption and income from proprietary and non-proprietary wealth. I call this factor the cpy residual. It reflects cyclical fluctuations in proprietary income, is highly correlated with cross-sectional measures of idiosyncratic entrepreneurial risk and has considerable forecasting power for U.S. stock returns. In line with the theoretical mechanism, the correlation between cpy and the stock market has been declining since the beginning of the 1980s as stock market participation has widened and as entrepreneurial risk has become more easily diversifiable in the wake of U.S. state-level bank deregulation.

non-insurable background risk, entrepreneurial income, equity risk premium, long-horizon predictability

Abstract:
Consumption risk sharing among U.S. federal states increases in booms and decreases in recessions. We find that small firms' access to credit markets plays an important role in explaining this stylized fact: business cycle fluctuations in aggregate risk sharing are more pronounced in states in which small firms account for a large share income or employment. In addition, better access of small firms to credit markets in the wake of state-level banking deregulation during the 1980s seems to have loosened the dependence of aggregate risk sharing on the business cycle. Not only do our result support that better access to credit markets may have made it easier for the owners of small firms to smooth income in the face of adverse cash-flows shocks to their business. They suggest a major additional benefit from banking deregulation: access to bank credit has become more reliable and is more easily available when households and firms need it most urgently - in economic downturns.

Interstate risk sharing, regional business cycle, proprietary income, small businesses, state banking deregulation

Abstract:
Although the real exchange rate - real interest rate (RERI) relationship is central to most open economy macroeconomic models, empirical support for the relationship is generally found to be rather weak. In this paper we re-investigate the RERI relationship using bilateral U.S. real exchange rate data spanning the period 1978 to 2007. Instead of testing one particular model, we build on Campbell and Shiller (1987) to propose a metric of the economic significance of the relationship. Our empirical results provide robust evidence that the RERI link is economically significant and that the real interest rate differential is a reasonable approximation of the expected rate of depreciation over longer horizons.

Real Exchange Rates, Real Interest Rates, Present Value Model

Abstract:
This paper establishes a surprising and robust empirical similarity between short-run heterogeneous consumption and long-term consumption growth risk models. The models not only deliver a similar fit on a given set of portfolios, their actual pricing errors are also highly correlated. In addition, we find that consumption dispersion is a robust predictor of the transitory component in aggregate consumption growth. To interpret these findings, we propose a model in which aggregate uncertainty is a function of idiosyncratic uncertainty and only long-term consumption growth risk is priced. An implication of this being that consumption dispersion is priced empirically not because markets are necessarily incomplete but because investors disagree in the short-run about their common long-term consumption prospects.

consumption CAPM, idiosyncratic risk, consumption dispersion

Abstract:
Consumption based measures of international risk sharing seem to defy the effects of more than two decades of ongoing financial globalization. We put forward an explanation of this puzzle: under incomplete risk sharing and if there are several sources of risk, consumption based measures of risk sharing will also be a function of the structure of business cycles, i.e., their degree of synchronization and persistence. We argue that permanent and transitory shocks to output constitute such qualitatively different sources of risk. Using OECD data, we then illustrate that countries have indeed become more insured against permanent shocks, in line with the ever better integration of financial markets. Basic measures of risk sharing have however not picked up this change because globalization has also affected the structure of business cycles. In particular, our results are consistent with the observation recently made by several authors that the globalization period has seen the emergence of less volatile and internationally more synchronized business cycles among industrialized countries.

Consumption risk sharing, capital flows, home bias, international and regional business cycles

Abstract:
We explore the link between portfolio home bias and consumption risk sharing among Italian regions using aggregated household level information on consumption, income and portfolio holdings. We propose to use data on equity fund ownership to proxy for regional home bias: equity funds are typically diversified at the national or international level and will therefore provide interregional diversification. In assessing the impact of equity fund ownership on interregional risk sharing we distinguish between two dimensions: variation in the share of equity funds in fund-holder's wealth (the intensive margin) and variation in the fraction of households that hold funds (the extensive margin). We find that equity fund ownership is an important determinant of interregional risk sharing. First, diversification incentives qualitatively line up with actually observed portfolio choices: fund holders in regions where households are particularly exposed to region-specific labor income risk hold a larger fraction of their wealth in (out-of-region) funds. Secondly, for a region as a whole, risk sharing increases in both the intensive and the extensive margins of diversification and the two margins reinforce each other. The marginal effect of wider equity fund participation seems particularly strong, suggesting that policies aimed at increasing equity market participation could help foster better interregional risk sharing.

consumption risk sharing, regional home bias, survey of household income and wealth, labor income risk, portfolio choice, stock market participation

Abstract:
This paper provides further evidence on the recent increase in international consumption risk sharing. We show that this increase is more pronounced among EU and EMU countries than among non-E(M)U industrialised countries. We also show that the patterns of international but not intra-European risk sharing have started to diverge from what is found at the level of the OECD as a whole. During the 1990s, capital income flows have started to play a relatively more important role between European countries, whereas the increase in international risk sharing among the OECD as a whole is almost exclusively driven by better consumption smoothing through the accumulation or decumulation of foreign assets. This EMU effect on the pattern of risk sharing survives once we control for differences in international portfolio holdings: while we find that countries with higher equity cross-holdings also tend to share more risk through capital income flows there remains an independent EMU-effect on the way in which risk is shared. While it is too early to evaluate these findings conclusively, we discuss some possible interpretations and their implications for economic policy.

Capital flows, Consumption Risk Sharing, EMU, Financial integration, Home Bias

Abstract:
Strongly periodic series occur frequently in many disciplines. This paper reviews one specific approach to analyzing such series viz. the harmonic regression approach. In this paper, the five major methods suggested under this approach are critically reviewed and compared, and their empirical potential highlighted via two applications. The out-of-sample forecast comparisons are made using the Superior Predictive Ability test, which specifically guards against the perils of data snooping. Certain tentative conclusions are drawn regarding the relative forecasting ability of the different methods.

autoregressive methods, data snooping, dynamic harmonic regression, eigenvalue methods, mixed spectrum, multiple forecast comparisons

Abstract:
In spite of two decades of financial globalization, consumption-based indicators do not seem to signal more international risk sharing. We argue that the fraction of idiosyncratic consumption risk that gets shared among industrialized countries has actually increased considerably over the period 1980-2000 and, in particular, during the 1990s - from around 30 to more than 60 percent. However, standard consumption-based measures of risk sharing - such as the volatility of consumption conditional on output or international consumption correlations - have been unable to detect this increase because consumption has also been affected by the concurrent decline in the volatility of output growth in most industrialized countries since the 1980s. First, the volatility of output at business-cycle frequencies has declined by more than has the volatility of permanent fluctuations. Since consumption reacts mainly to permanent shocks, it appears more volatile in relation to current changes in output. This effect seems to have offset the tendency of financial globalization to lower the volatility of consumption conditional on output. Second, because the variability of permanent global shocks has also fallen, international consumption correlations have also generally not increased as financial markets have become more integrated.

Consumption risk sharing, international business cycles, great moderation, financial integration and capital flows, home bias