This paper uses a recently suggested test for unit roots in panels of time series data (Maddala and Wu, 1999) to consider the Purchasing Power Parity hypothesis. The major innovation of this test is that it allows both the testing of unit root null, using the ADF test, and the stationarity null,...

We comment on a recent paper by Beaver, McAnally and Stinson (1997), drawing attention to the fact that their method ignores some recent developments in time-series econometrics. We apply a bi-variate vector autoregression framework to price and earnings data of listed US companies and the...

The paper uses a recently suggested test for unit roots in panels of time series data (Maddala and Wu, 1999) to consider the Purchasing Power Parity Hypothesis. The major innovation of this test is that it allows both the testing of the unit root null, using the ADF test, and the stationarity...

The paper examines the relative performance of Stochastic Volatility (SV) and GARCH(1,1) models fitted to twenty plus years of daily data for three indices. As a benchmark, I use the realized volatility (RV) for the S&P 500, DOW JONES and STOXX50 indices, sampled at 5-minute intervals, taken...