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Report
The long-run determinants of U.S. external imbalances
This paper develops a tractable two-country model with life-cycle structure to investigate analytically and quantitatively three potential determinants of the U.S. external imbalances in the last three decades: productivity growth, demographic factors, and fiscal policy. The results suggest that (1) productivity growth differentials are the main driving force at high frequencies, (2) the different evolution of demographic factors across countries accounts for a large portion of the long-run trend, and (3) fiscal policy plays, at best, a minor role. The main prediction of the analysis is that ...
Journal Article
How stimulatory are large-scale asset purchases?
The Federal Reserve?s large-scale purchases of long-term Treasury securities most likely provided a moderate boost to economic growth and inflation. Importantly, the effects appear to depend greatly on the Fed?s guidance that short-term interest rates would remain low for an extended period. Indeed, estimates from a macroeconomic model suggest that such interest rate forward guidance probably has greater effects than signals about the amount of assets purchased.
Working Paper
Has U.S. Monetary Policy Tracked the Efficient Interest Rate?
Interest rate decisions by central banks are universally discussed in terms of Taylor rules, which describe policy rates as responding to inflation and some measure of the output gap. We show that an alternative specification of the monetary policy reaction function, in which the interest rate tracks the evolution of a Wicksellian efficient rate of return as the primary indicator of real activity, fits the U.S. data better than otherwise identical Taylor rules. This surprising result holds for a wide variety of specifications of the other ingredients of the policy rule and of approaches to ...
Report
Evaluating interest rate rules in an estimated DSGE model
The empirical DSGE (dynamic stochastic general equilibrium) literature pays surprisingly little attention to the behavior of the monetary authority. Alternative policy rule specifications abound, but their relative merit is rarely discussed. We contribute to filling this gap by comparing the fit of a large set of interest rate rules (fifty-five in total), which we estimate within a simple New Keynesian model. We find that specifications in which monetary policy responds to inflation and to deviations of output from its efficient level?the one that would prevail in the absence of ...
Journal Article
Demographic Transition and Low U.S. Interest Rates
Interest rates have been trending down for more than two decades. One possible explanation is the dramatic worldwide demographic transition, with people living longer and population growth rates declining. This demographic transition in the United States?particularly the steady increase in life expectancy?put significant downward pressure on interest rates between 1990 and 2016. Because demographic movements tend to be long-lasting, their ongoing effects could keep interest rates near the lower bound longer. This has the potential to limit the scope for central banks to respond to future ...
Working Paper
Demographics and Real Interest Rates Across Countries and Over Time
We explore the implications of demographic trends for the evolution of real interest rates across countries and over time. To that end, we develop a tractable three-country general equilibrium model with imperfect capital mobility and country-specific demographic trends. We calibrate the model to study how low-frequency movements in a country's real interest rate depend on its own and other countries' demographic factors, given a certain degree of financial integration. The more financially integrated a country is, the higher the sensitivity of its real interest rate to global developments ...
Working Paper
Demographics and real interest rates: inspecting the mechanism
The demographic transition can affect the equilibrium real interest rate through three channels. An increase in longevity?or expectations thereof?puts downward pressure on the real interest rate, as agents build up their savings in anticipation of a longer retirement period. A reduction in the population growth rate has two counteracting effects. On the one hand, capital per-worker rises, thus inducing lower real interest rates through a reduction in the marginal product of capital. On the other hand, the decline in population growth eventually leads to a higher dependency ratio (the fraction ...
Report
House price booms, current account deficits, and low interest rates
One of the most striking features of the period before the Great Recession is the strong positive correlation between house price appreciation and current account deficits, not only in the United States but also in other countries that have subsequently experienced the highest degree of financial turmoil. A progressive relaxation of credit standards can rationalize this empirical observation. Lower collateral requirements facilitate access to external funding and drive up house prices. The current account turns negative because households borrow from the rest of the world. At the same time, ...
Working Paper
Current account dynamics and monetary policy
We explore the implications of current account adjustment for monetary policy within a simple two country SGE model. Our framework nests Obstfeld and Rogoff's (2005) static model of exchange rate responsiveness to current account reversals. It extends this approach by endogenizing the dynamic adjustment path and by incorporating production and nominal price rigidities in order to study the role of monetary policy. We consider two different adjustment scenarios. The first is a "slow burn" where the adjustment of the current account deficit of the home country is smooth and slow. The second ...
Report
The macroeconomic effects of large-scale asset purchase programs
The effects of asset purchase programs on macroeconomic variables are likely to be moderate. We reach this conclusion after simulating the impact of the Federal Reserve?s second large-scale asset purchase program (LSAP II) in a DSGE model enriched with a preferred habitat framework and estimated on U.S. data. Our simulations suggest that such a program increases GDP growth by less than half a percentage point, although the effect on the level of GDP is very persistent. The program?s marginal contribution to inflation is very small. One key reason for our findings is that we estimate a small ...