The Stochastic Convergence of CO<Subscript>2</Subscript> Emissions: A Long Memory Approach

In response to equity concerns surrounding the spatial distribution of CO₂ emissions and assumptions of CO₂ convergence within some climate models, this paper examines the convergence of CO₂ emissions within the OECD over the period 1870–2004. More specifically, using the Local Whittle estimator and its variants we examine whether relative per capita CO₂ emissions are fractionally integrated, that is they are long memory processes which, although highly persistant, may revert to the mean/trend in the long run. Our results suggest that CO₂ emissions within 13 out of 18 OECD countries are indeed fractionally integrated implying that they converge over time, albeit slowly. Interestingly though, the countries whose emissions are not found to be fractionally integrated are some of the highest polluters within the OECD, at least in per capita terms. Our results have implications both for future studies of CO₂ convergence and for climate policy.     

On real interest rate persistence: the role of breaks

The role of structural breaks in long spans of ex-post real interest rates for 10 industrialized countries is studied. First, the persistence of the real interest is assessed with newly proposed low-frequency tests of Müller and Watson (2008). Second, the test of Leybourne et al. (2007) for a change in persistence of a time series is applied to the real interest rate. The results show that real interest rates over the full sample period do not fit a covariance-stationary or unit-root model, nor a fractionally integrated, near-unit-root or local-level model. Instead, the persistence of real rates changes over time and there are periods when the real rate is covariance-stationary and other periods when it follows a unit-root process.     

The yield curve and the macroeconomy: Evidence from Turkey

This paper contributes to the literature on the relationship between the yield curve and macroeconomic variables by focusing on an emerging market case: Turkey. The most important result of the paper is that the relationship between the yield curve and macroeconomic variables is significantly affected by the change in monetary policy which is associated with the implementation of inflation targeting (IT) regime. While before the IT regime the yield curve is affected to some extent by macroeconomic variables, after the IT regime, it is mainly driven by macroeconomic variables. We also find that central bank has gained ability to affect the entire yield curve with the IT regime. The other important result is that in addition to inflation and real activities, the exchange rates also play an important role in the yield curve dynamics in Turkey.     

Strong dependence in the real interest rates

The stochastic behaviour of the real interest rates in ten European countries, Canada and the US is examined in this article by means of fractionally integrated techniques. Using a procedure, specifically designed for testing I (d) statistical models, the results show that the real interest rates are more persistent in some countries like France, Belgium or the USA than in others like the UK or Germany.     

Inflation targeting and the need for a new central banking framework

This article critically analyzes inflation targeting (IT) both theoretically and empirically. IT came into prominence in the 1990s and 1 central bank after another adopted this regime in the 1990s and 2000s. Proponents of IT mainly argued that IT regime was successful on the grounds that it resulted in lower inflation rates and hence better economic performances. However, inflation rates in the world were in a downward trend from the 1980s well into the 2000s, and both IT and non-IT regimes managed to decrease their inflation rates. In addition, focusing too much on price stability through IT paved the way for permanently higher than necessary interest rates and disinflationary “tight” monetary policy periods when inflation rate was above an arbitrarily targeted level. Tight monetary policy can and do affect the real economy negatively and overemphasizing price stability may hurt the economy in terms of lower potential output, decreasing investment and more unequal income distribution. Post Keynesians offer valuable alternatives within the framework of parking-it approach to the existing monetary policy paradigm. Our main conclusion is that central banks should set the policy interest rate as low as possible and keep it there, in line with Keynesian “cheap money” policy.     

Long memory in the interest rates in some Asian countries

In this paper, the stochastic behavior of short run interest rates in some Asian development countries is examined by means of using fractionally integrated semiparametric techniques. In doing so, a much richer flexibility is allowed in the dynamic behavior of the series not achieved by the classical representations based on I(0) or I(1) processes. The author uses a quasi-maximum likelihood estimation procedure of Robinson [QMLE, 1995a], which has some advantages with respect to other methods. The results show that the orders of integration of the short run interest rates in Singapore and Thailand are strictly below 1, implying mean reversion. On the contrary, the results for Malaysia, South Korea, and Philippines are less conclusive, the values of d oscillating around the unit root case.     

Long-run versus short-run behaviour of the real exchange rates

This paper discusses the mean stationarity of real exchange rates by using new time series methods and new tests. The question whether the real exchange rates have a unit root or are level reverting is set in the general and flexible framework of fractionally integrated processes. The estimations and tests sustain the claim that real exchange rates may be nonstationary and not revert to any short-run parity. However, estimations also suggest that real exchange rates behave differently on the short and on the long run and that they may revert to parity in a century-long period.     

Small sample bias in conditional sum-of-squares estimators of fractionally integrated ARMA models

This paper considers estimation of the parameters for the fractionally integrated class of processes known as ARFIMA. We consider the small sample properties of a conditional sum-of-squares estimator that is asymptotically equivalent to MLE. This estimator has the advantage of being relatively simple and can estimate all the parameters, including the mean, simultaneously. The simulation evidence we present indicates that estimation of the mean can make a considerable difference to the small sample bias and MSE of the other parameter estimates.     

A general model for short-term interest rates

A general one-factor model for short-term interest rates is proposed. Besides the long memory fractionally integrated mean process, the model also consists of a power function of the interest rate as well as the GARCH effect in the conditional variance. The estimation results show that, while there is no evidence for fractional integration in the mean beyond the well-known martingale property, both the power function of the interest rate and the GARCH effect (but not the ARCH effect) are highly significant in the formation of the conditional variance. Test results also confirm a structure change in October 1979 due to the shift in the Federal Reserve monetary policy.     

From Peg to Float: Exchange Market Pressure and Monetary Policy in the Czech Republic

Exchange market pressure (EMP) in the Czech Republic is calculated for 1995–2006, when the Czech National Bank transitioned to inflation targeting (IT). EMP is a useful indicator of incipient foreign exchange market pressures, a signal of the need for policy adjustments and a clear delineator of monetary policy regime change. VAR estimates clearly identify quite different policy responses during the two regimes. During 1995–98, interest rate and domestic credit responses to EMP were statistically significant and in accord with traditional theory, i.e. domestic credit creation and interest rates were managed to maintain the exchange rate target as if policymakers were explicitly responding to changes in EMP. During the 1998–2006 IT regime there is a link between domestic credit creation and EMP, with no interest rate effects. Exchange market interventions were incidental and supportive of IT goals. Impulse response functions mirror the VAR and Granger causality results.     

Nominal and real convergence between the CEE countries and the EU: a fractional cointegration analysis

This paper examines the real and nominal convergence between the Central and Eastern European countries and the EU, using fractional cointegration analysis for the period 1980–2003. Fractional cointegration analysis is a flexible methodology, which allows for more subtle forms of mean reversion. The tests performed are those of Geweke and Porter-Hudak. The convergence processes are valid when macroeconomic time series used in the study are fractionally cointegrated. The results indicate that inflation and interest rates series of six sample countries are fractionally cointegrated with those of the EU. Therefore, nominal convergence has been achieved by some of the transition countries, but the equilibrium errors display long memory. Results also indicate that industrial outputs of most countries in the sample are not fractionally cointegrated with that of the EU. The results further indicate that both nominal and real convergence have been achieved only for Hungary.     

Uncertainty and implied variance bounds in long-memory models of the interest rate term structure

We find that long-term uncertainty in a linear model of the interest rate term structure can have dramatic effects on variance bounds implied by the expectations theories of the term structure. We bootstrap fractionally integrated models of the term structure of interest rates. The fractional order of integration's bootstrapped standard errors simulate uncertainty surrounding long-term forecasts of interest rates, and we find that it is possible to overstate the significance of variance-bounds violations by at least a factor of three and perhaps by a factor of ten when long-term uncertainty is ignored.I wish to thank Frank Diebold, Baldey Raj, Eric Renault, Fallaw Sowell and several anonymous referees for their comments and suggestions for earlier versions of this paper. The paper also benefited from comments made by many seminar participants at the World Econometric Congress, the European Econometric Society, and the American Finance Association meetings, the Board of Governors of the Federal Reserve System, the Ecole Nationale de la Statistique et de l'Administration Economique, and the departments of Finance and Statistics at Penn State University.     

Fractional integration with drift: estimation in small samples

We examine the finite-sample behavior of estimators of the order of integration in a fractionally integrated time-series model. In particular, we compare exact time-domain likelihood estimation to frequency-domain approximate likelihood estimation. We show that over-differencing is of critical importance for time-domain maximum-likelihood estimation in finite samples. Overdifferencing moves the differencing parameter (in the over-differenced model) away from the boundary of the parameter space, while at the same time obviating the need to estimate the drift parameter. The two estimators that we compare are asymptotically equivalent. In small samples, however, the time-domain estimator has smaller mean squared error than the frequency-domain estimator. Although the frequency-domain estimator has larger bias than the time-domain estimator for some regions of the parameter bias, it can also have smaller bias. We use a simulation procedure which exploits the approximate linearity of the bias function to reduce the bias in the time-domain estimator.     

Inflation targeting in Brazil

The purpose of this paper is to examine the Inflation Targeting (IT) framework as it is applied in the case of Brazil since its adoption in June 1999. For this purpose we first summarize the macroeconometric model utilized by the Central Bank of Brazil (BCB) in its pursuit of the IT framework. While the focus of this paper is on Brazil, we also examine the experience of other countries with IT (in particular, the BRIC countries: Brazil, Russia, India, and China), both for comparative purposes and for evidence of the extent of success of this ‘new’ economic policy pursued by other IT countries. In addition, we compare the experience of Brazil with IT and with that of non‐IT countries. In the context of non‐IT countries, we ask the question of whether it makes a difference in the fight against inflation whether a country has adopted IT or not. Finally, we examine some features of the Brazilian experience with IT regime.     

The expectations hypothesis of the term structure of interest rates: The Brazilian case revisited

This article tests the Expectations Hypothesis (EH) using Brazilian monthly data for bond yields spanning the 2000–2017 sample period and ranging in maturity from 3 months to 5 years. Three tests are examined: the first is based on interest rates spread and the other two are based on the forward rates. On balance our results suggest rejection of the EH throughout the maturity spectrum examined, and are broadly consistent with previous findings that a linear combination of forward rates provides a statistically significant prediction of bond excess returns.     

Exchange Rate Passthrough Effects and Inflation Targeting in Emerging Economies: What is the Relationship?

Several studies have shown that over the past 10 years the passthrough effect from currency depreciation into domestic inflation has been decreasing in emerging economies that adopted inflation targeting (IT) during the mid and late 1990s. Therefore the nominal exchange rate effect on domestic inflation is becoming less of an issue for these countries. The literature has offered different explanations for these declines but so far they have not been directly related to the adoption of IT. This paper shows that lower passthrough effects can also be the result of the implementation of an IT regime and argues, contrary to previous studies, that the effects of the nominal exchange rate on inflation are still a relevant issue for emerging IT countries. The reason for this is that the empirical evidence offered for the lower passthrough misses the nature of the relationship between inflation and the nominal exchange rate under IT.     

Modelling the US real GNP with fractionally integrated techniques

The US real GNP is analysed by means of fractionally integrated techniques. LM tests proposed by Robinson for testing unit roots and other fractionally integrated hypotheses are applied to the quarterly GNP series and to its log-transformation. The maximum likelihood estimation procedure of Sowell for estimating ARFIMA models is implemented. The results indicate that the order of integration of the US real output is much higher than one, and thus, the standard approach of taking first differences may still produce series with long memory behaviour.     

Exchange rates dynamics revisited: a panel data test of the fractional integration order

We test the possibility that exchange rates from nine developed countries have a unit root against the alternate possibility that they are fractionally integrated. Theoretically, exchange rates are only expected to follow a random walk under restrictive assumptions. However, most traditional unit root tests cannot reject a unit root in exchange rates, and time series tests that allow for fractional integration have given inconclusive results. To increase the power of the test of the integration order we develop two panel data tests of the fractional integration order. Monte Carlo simulations show that these tests are correctly sized and have relatively high power compared to other similar tests. Moreover, our empirical results show that we can reject a unit root in exchange rates with a high probability, but the integration order is close to one. This indicates that exchange rates are mean-reverting, although the reversion is slow, resulting in long swings.     

Bank lending and interest on excess reserves: An empirical investigation

This paper econometrically tests for effects on bank lending of the Federal Reserve’s policy of paying interest on excess reserves (IOER). Following the 2008 financial crisis, US banks decreased their loan allocations and increased holdings of excess reserves. A model of bank asset allocation shows that when the rate of IOER is higher than other short-term rates, banks will switch from zero excess reserves to a regime with higher excess reserves and lower lending. Using a sample of panel data on US banks from 2000 through 2018, we find evidence of a switch to a positive excess reserve regime in the post-crisis period. Controlling for market interest rates, loan demand, and economic activity, we find that IOER accounts for the majority of the decline in bank lending after the financial crisis.