The usual measure of the undiversifiable risk of a portfolio is its beta. Recent research has allowed beta estimates to vary over time, often based on symmetric multivariate GARCH models. There is, however, widespread evidence in the literature that the volatilities of asset returns, in...

We study the effects of growth volatility and inflation volatility on average rates of output growth and inflation for postwar U.S. data in a multivariate asymmetric GARCH-M model. Our statistical model differs from other work in that we allow the conditional covariance of inflation and growth...

Research by Ghali (1999) tested for the existence of causality between wages and prices in United States' aggregate data using a multivariate cointegration framework. We show that Ghali's model is misspecified and that the correct specification leads to a different interpretation of the long-run...

This paper considers the extent to which fluctuations in Australian economic growth are affected by domestic and overseas economic performance. We investigate the performance of a range of non-linear models versus linear models using Bayes factors and posterior odds ratios. The posterior odds...

Empirical evidence documents a level effect in the volatility of short term rates of interest. That is, volatility is positively correlated with the level of the short term interest rate. Using Monte-Carlo simulations this paper examines the performance of the commonly used Engle-Ng (1993) tests...

This paper investigates the relationship between output volatility and growth using post-war real GDP data for the United States. We expand on recent research by Beaudry and Koop (1993) documenting the asymmetric effect of recessions on output growth. The results presented in this paper suggest...

The Friedman-Ball hypothesis implies a link between the inflation rate and inflation uncertainty. In this paper we employ a new test for the joint null hypothesis of no dependence effects and no asymmetry in the G7 inflation volatility. The results show that higher inflation rates operate...

Evidence suggests that short-term interest rate volatility peaks with the level of short rates, while equity volatility responds asymmetrically to positive and negative shocks. We present an LM based test that distinguishes between level effects and asymmetry in volatility which is robust to the...

Many popular techniques for determining a securities firm's value-at-risk are based upon the calculation of the historical volatility of returns to the assets that comprise the portfolio and of the correlations between them. One such approach is the JP Morgan RiskMetrics methodology using...