Всего статей в данном разделе : 172
Опубликовано на портале: 22-10-2007Lars Peter Hansen, Thomas J. Sargent Review of Economic Dynamics. 2001. Vol. 4. No. 3. P. 519-535.
We explore methods for confronting model misspecification in macroeconomics. We construct dynamic equilibria in which private agents and policy makers recognize that models are approximations. We explore two generalizations of reational expectations equilibria. In one of these equilibria, decision-makers use dynamic evolution equations that are imperfect statistical approximations, and in the other misspecification is impossible to detect even from infinite samples of time series data. In the first of these equilibria, decision rules are tailored to be robust to the allowable statistical discrepancies. Using frequency domain methods, we show that robust decision-makers treat model misspecification like time series econometricians
Опубликовано на портале: 25-10-2007Philippe Aghion, Philippe Bacchetta, Abhijit Banerjee Journal of Economic Theory. 2004. Vol. 119. No. 1. P. 6-30.
This paper presents a general equilibrium currency crisis model of the 'third generation', in which the possibility of currency crises is driven by the interplay between private firms' credit-constraints and nominal price rigidities. Despite our emphasis on microfoundations, the model remains sufficiently simple that the policy analysis can be conducted graphically. The analysis hinges on four main features: i) ex post deviations from purchasing power parity; ii) credit constraints a la Bernanke-Gertler; iii) foreign currency borrowing by domestic firms; iv) a competitive banking sector lending to firms and holding reserves and a monetary policy conducted either through open market operations or short-term lending facilities. We first show that with a positive likelihood of a currency crisis, firms may indeed find it optimal to borrow in foreign currency, following Chamon (2001). Second, we derive sufficient conditions for the existence of a sunspot equilibrium with currency crises. Third, we show that a reduction in the monetary base through restrictive open market operations is more likely to eliminate the possibility of currency crises if at the same time the central bank does not impose excessive constraints on short-term lending facilities
Опубликовано на портале: 16-11-2007Bruce Preston Journal of Monetary Economics. 2006. Vol. 53. No. 3. P. 507-535.
This paper argues that recently popular forecast-based instrument rules for monetary policy may fail to stabilize economic fluctuations. In a New Keynesian model of output gap and inflation determination in which private agents face multi-period decision problems, but have non-rational expectations and learn over time, if the monetary authority adopts a forecast-based instrument rule and responds to observed private forecasts then this class of policies frequently induce divergent learning dynamics. A central bank that correctly understands private behavior can mitigate such instability by responding to the determinants of private forecasts. This suggests gathering information on the determinants of expectations to be useful
Опубликовано на портале: 11-11-2004Ricardo J. Caballero, Arvind Krishnamurthy NBER Working Paper Series. 2002. w8758.
The last few years have seen a significant re-evaluation of the models used to analyze crises in emerging markets. Recent models typically stress financial constraints or distorted financial incentives. While this certainly represents progress, these models share a weakness with the earlier work: neither is uniquely about emerging markets. Adaptations of the Mundell-Fleming model represent Argentina as a Belgium with larger external shocks. Likewise, emerging market models of financial constraints are adaptations of developed economy ones with tighter financial constraints. In our work, we have advocated a model which distinguishes between the financial constraints affecting borrowing and lending among agents within an emerging economy, and those affecting borrowing from foreign lenders. This 'dual liquidity' model offers a parsimonious description of the behavior of firms, governments, and asset prices during financial crises. It also provides prescriptions for optimal policy responses to these crises.
Опубликовано на портале: 03-12-2007Carolyn Sissoko Economics Discussion Papers. 2007. No. 2007-16.
Using the monetary model developed in Sissoko (2007), where the general equilibrium assumption that every agent buys and sells simultaneously is relaxed, we observe that in this environment fiat money can implement a Pareto optimum only if taxes are type-specific. We then consider intermediated money by assuming that financial intermediaries whose liabilities circulate as money have an important identifying characteristic: they are widely viewed as default-free. The paper demonstrates that default-free intermediaries who issue credit lines to consumers can resolve the monetary problem and make it possible for the economy to reach a Pareto optimum. We argue that our idealized concept of financial intermediation is a starting point for studying the monetary use of credit.
Опубликовано на портале: 23-12-2007Laurent Bilke, Livio Stracca Economic Modelling. 2007. Vol. 24. No. 6. P. 1032-1047.
We propose a new core inflation measure for the Euro area which places the emphasis on the more lasting, i.e. persistent, price developments at a disaggregated level. The importance of each component of the HICP is reweighted according to its relative persistence, as measured by the sum of the autoregressive coefficients or by an indicator of mean reversion. Unlike headline inflation, our baseline core inflation measure is highly correlated with ECB monetary policy decisions, which could mean that they contain ex ante (pre monetary policy) information on inflationary pressure.
Опубликовано на портале: 15-11-2007Thomas J. Sargent Journal of Banking & Finance. 1999. Vol. 23. No. 10. P. 1463-1482.
Monetary policy can be constrained by fiscal policy if fiscal deficits grow large enough to require monetization of government debt. That fact implies that the administrative independence of central banks does not by itself imply that monetary policy is independent of the fiscal decisions of governments. This essay describes limitations, possibilities, and suitable goals for monetary policy within the existing pattern of institutional responsibilities. The economic limitations of what can be achieved by monetary policy are summarized in six propositions developed in the paper.
Опубликовано на портале: 25-10-2007Tuomas A. Peltonen European Central Bank, Working Paper Series. 2006. No. 571.
This paper analyzes the predictability of emerging market currency crises by comparing the often used probit model to a new method, namely a multi-layer perceptron artificial neural network (ANN) model. According to the results, both models were able to signal currency crises reasonably well in-sample, but the forecasting power of these models out-ofsample was found to be rather poor. Only in the case of Russian (1998) crisis were both models able to signal the crisis well in advance. The results reinforced the view that developing a stable model that can predict or even explain currency crises is a challenging task
Опубликовано на портале: 14-03-2005Ross Levine NBER Working Paper Series. 2002. No. 9138.
For over a century, economists and policy makers have debated the relative merits of bank-based versus market-based financial systems. Recent research, however, argues that classifying countries as bank-based or market is not a very fruitful way to distinguish financial systems. This paper represents the first broad, cross-country examination of which view of financial structure is more consistent with the data. The results indicate that although overall financial development is robustly linked with economic growth, there is no support for either the bank-based or market-based view.
Опубликовано на портале: 03-12-2007Emine Boz IMF, Working Paper. 2007. No. 07/223.
Emerging market financial crises are abrupt and dramatic, usually occurring after a period of high output growth, massive capital flows, and a boom in asset markets. This paper develops an equilibrium asset-pricing model with informational frictions in which vulnerability and the crisis itself are consequences of the investor optimism in the period preceding the crisis. The model features two sets of investors, domestic and foreign. Both sets of investors learn from noisy signals, which contain information relevant for asset returns and formulate expectations, or "beliefs," about the state of productivity. We show that, if preceded by a sequence of positive signals, a small, negative noise shock can trigger a sharp downward adjustment in investors' beliefs, asset prices, and consumption. The magnitude of this downward adjustment and sensitivity to negative signals increase with the level of optimism attained prior to the negative signal.
Опубликовано на портале: 11-11-2004Sebastian Edwards NBER Working Paper Series. 1998. w6800.
This paper deals with some of the most important aspects of Latin America's experience with capital flows during the last twenty-five years. The paper begins with a historical analysis. I then deal with the sequencing of reform and discuss issues related to the relationship between capital flows, real exchange rates, and international competitiveness. I next concentrate on the role of capital controls as a device for isolating emerging economies from the volatility of international capital markets. I begin by reviewing the policy issues and the current debate on the subject. I then present an empirical analysis of Chile's recent experiences with capital controls and make some comparisons to the recent experiences of Columbia. The analysis of the Chilean experience is particularly important since its practice of imposing reserves requirements on capital inflows has been praised by a number of analysts, including senior staff of the multilateral institutions, as an effective and efficient way of reducing the vulnerability associated with capital flows volatility. The results obtained suggest that capital controls in Chile have had mixed results: while they have allowed the Central Bank to have a greater degree of control over short term interest rates, they have failed in avoiding real exchange rate appreciation. The paper ends with some reflections, based on recent Latin American historical episodes, on the role of banks in intermediating capital inflows and on financial crises.
Central Bank Independence, Accountability and Transparency: Complements or Strategic Substitutes? [статья]
Опубликовано на портале: 26-10-2007Andrew Hughes Hallett, Jan Libich CEPR Discussion Papers. 2006. No. 5470.
The paper incorporates three institutional design features into a Kydland-Prescott, Barro-Gordon monetary policy game. It shows that goal independence and goal transparency (an explicit inflation target) at the central bank are substitute ‘commitment technologies’ that reduce inflation and build credibility. In addition, goal-transparency is shown to be socially superior as it also lowers public’s monitoring cost. Nevertheless, independent central bankers are less likely to embrace it if they perceive public scrutiny (accountability) as intrusive. Combining these findings implies that both goal-transparency and accountability will be negatively related to goal-independence for which we present empirical support using established indices. Our analysis further suggests that, to avoid an inferior equilibrium with opaque objectives and a ‘democratic deficit’, institutional reforms should follow the Bank of England scenario, in which an explicit inflation target is first legislated and only then instrument (but not goal) independence granted.
Central Bank Learning, Terms of Trade Shocks and Currency Risk: Should Only Inflation Matter for Monetary Policy? [статья]
Опубликовано на портале: 15-11-2007G.C. Lim, Paul D. McNelis Journal of Intrernational Money and Finance. 2007. Vol. 26. No. 6. P. 865-886.
This paper examines the role of interest rate policy in a small open economy, subject to terms of trade shocks and time-varying currency risks. The private sector makes optimal decisions in an intertemporal, non-linear setting with rational, forward-looking expectations. In contrast, the monetary authority chooses an optimal interest rate reaction function, given a loss function that is conditional on the state of the economy and given its “least squares learning” about the evolution of inflation and exchange-rate depreciation. The simulation results of the effects of different policy scenarios on welfare show that, on balance, the preferred stance should be strict inflation targeting.
Опубликовано на портале: 25-10-2007Reuven Glick, Andrew K. Rose Journal of Intrernational Money and Finance. 1999. Vol. 18. No. 4. P. 603-617.
Currency crises tend to be regional; they affect countries in geographic proximity. This suggests that patterns of international trade are important in understanding how currency crises spread, above and beyond any macroeconomic phenomena. We provide empirical support for this hypothesis. Using data for five different currency crises (in 1971, 1973, 1992, 1994, and 1997) we show that currency crises affect clusters of countries tied together by international trade. By way of contrast, macroeconomic and financial influences are not closely associated with the cross-country incidence of speculative attacks. We also show that trade linkages help explain cross-country correlations in exchange market pressure during crisis episodes, even after controlling for macroeconomic factors
Опубликовано на портале: 11-11-2004Sebastian Edwards NBER Working Paper Series. 2002. w8939.
In this paper I analyze the relationship between fiscal policy, aggregate public sector debt sustainability, and debt relief. I develop a methodology to compute the fiscal policy path that is compatible with aggregate debt sustainability in the post-HIPC era. The model explicitly considers the role of domestic debt, and quantifies the extent to which future debt sustainability depends on the availability of concessional loans at subsidized interest rates. The working of the model is illustrated for the case of Nicaragua, a country that in 2002 had one of the highest net present value of public external debt to GDP ratios.