A Bayesian encompassing test using combined value-at-risk estimates

The Value at Risk (VaR) is a risk measure that is widely used by financial institutions in allocating risk. VaR forecast estimation involves the conditional evaluation of quantiles based on the currently available information. Recent advances in VaR evaluation incorporate conditional variance into the quantile estimation, yielding the Conditional Autoregressive VaR (CAViaR) models. However, the large number of alternative CAViaR models raises the issue of identifying the optimal quantile predictor. To resolve this uncertainty, we propose a Bayesian encompassing test that evaluates various CAViaR models predictions against a combined CAViaR model based on the encompassing principle. This test provides a basis for forecasting combined conditional VaR estimates when there are evidences against the encompassing principle. We illustrate this test using simulated and financial daily return data series. The results demonstrate that there are evidences for using combined conditional VaR estimates when forecasting quantile risk.     

Oil and stock markets before and after financial crises: A local Gaussian correlation approach

The effect of financial shocks on the cross‐market linkages between oil prices (spot and futures) and stock markets is examined for four major crises. We employ the local Gaussian correlation approach and find that the two markets were regionalized for most of the 1990s and the early 2000s. Flights from stocks to oil occur in all crisis episodes, except the recent global financial crisis. The view that stock and oil markets behave like “a market of one” after the financialization of commodities is further supported by the presence of contagion between US stock markets and all the benchmark oil markets.     

Gibrat’s law and persistence of growth in Greek manufacturing

This study makes use of a sample of Greek manufacturing firms during 1995–2001 in order to analyze Gibrat’s law. We find Gibrat’s law is rejected for the total sample of firms, since persistence of growth plays a key role. The classification of firms in size and age groups, however, yields more interesting results: Gibrat’s law is rejected for micro, small, and young firms, since an inverse relationship between firm growth and initial firm size is found along with a persistence of growth rates in subsequent periods. In contrast, Gibrat’s law is accepted for medium, large, and old firms, implying that the growth patterns of these categories follow a random walk and do not tend to persist in subsequent periods.     

Monetary Policy Delegation, Contract Costs and Contract Targets

We reconsider the optimal central banker contract derived in Walsh (1995). We show that if the government's objective function places weight (value) on the cost of the contract, then the optimal inflation contract does not completely neutralize the inflation bias. Furthermore, the more concerned the government is about the cost of the contract or the less selfish is the central banker, the smaller is the share of the inflation bias eliminated by the contract. Finally, a central banker contract written in terms of output can completely eradicate the inflationary bias, regardless of concerns about contract costs.     

Trade flows: a facet of regionalism or globalisation?

This paper examines the evidence about the extent of globalisationby focusing on some aspects of international trade flows. Areinterpretation of the existing evidence based on the analysisof tables and a range of indicators is provided in the firstpart of the paper. The focus is on whether the increase in tradeflows has been predominantly a global or regional phenomenon.The analysis points to the tentative conclusion that the dominanttendency is the increase in trade within regional blocs (NorthAmerica, the EU and the Asia–Japan blocs) rather thanacross them. To address the same question, a more formal analysisis undertaken in the second part of the paper, by focusing onthe relative speed of the convergence in openness within andacross regions of the world. Our results indicate that the degreeof openness converges faster across the countries of a givenregion rather than at the global level, reinforcing the conclusionsfrom the first part of the paper. The results are consistentwith the view that trade integration is more of a ‘regional’phenomenon than a ‘global’ one.     

Dual foreign currency markets and the role of expectations: Evidence from the Pacific Basin countries

This paper analyzes the role of expectations about the government policy in the official foreign currency market in determining the black market premium. We use data for the recent float from six emerging markets of the Pacific Basin where active black markets for foreign currency exist, namely, Indonesia, Korea, Malaysia, the Philippines, Singapore and Thailand. To test the impact of anticipated and unanticipated shocks to the official exchange rate on the black market premium, we employ the two-step procedure of Hoffman et al. [Hoffman, D.L., Low, S.A., Schlagenhauf, D.E., 1984. Tests of rationality, neutrality and market efficiency: a Monte Carlo analysis of alternative test statistics. J. Monet. Econ. 14, 339–363] which provides corrected F-statistics and allows us to draw valid inference in the presence of generated regressors. The main finding of our analysis is that anticipated and unanticipated shocks to the official exchange rate have an impact on the black market premium in all six Pacific Basin countries. These results suggest that portfolio balance models provide the suitable theoretical framework for analyzing the behaviour of the black market premium in the markets for foreign currency in the Pacific Basin countries. Furthermore, this implies that economic agents in these countries are sensitive to expected returns in foreign exchange.     

Financial Development and Economic Activity in Advanced and Developing Open Economies: Evidence from Panel Cointegration

This study considers the effects of financial development on output in a panel cointegration framework, focusing on the implications of trade and financial openness. Our analysis indicates that after controlling for cross‐sectional dependence, the typical relationship between finance and output does not hold in the long run. This relationship, however, is re‐established once we account for economic openness. While trade openness emerges as more important for developing countries, financial openness is more important for advanced economies. In the long run, causality runs from financial development to output in the advanced economies, while in developing economies causality is bidirectional. There is no short‐run causality between financial development and output, however.     

Macroeconomic Volatility and the Current Account: Evidence from a Panel of OECD Countries

ABSTRACT

This paper investigates the relationship between macroeconomic volatility and the current account. Using quarterly data for a panel of OECD economies, time-varying relative volatility measures are constructed for GDP, net output, and government consumption. The empirical evidence suggests that current account balances are positively affected by all three volatility measures. Moreover, the current account balance is found to be related positively to output growth and negatively to the growth of government consumption. Evidence from saving and investment rates also suggests that the precautionary saving motive is part of (though perhaps not the entire) mechanism that relates output volatility and the current account. Broadly consistent with the predictions of the standard theoretical model, these estimates are sizable, statistically significant, and robust.