Estimation of volatility of financial time series plays a crucial role in pricing derivatives. Volatility is often estimated from historical data; however, it is well known that volatility varies in time. We propose a method to choose a suitable length of historical data to estimate contemporary...

The article deals with a typical phenomenon of financial time series - volatility. These time series usually embody intermittent periods of relative "calm" and quite high variability. A volatility modelling of time series is made with the help of special econometric volatility models which...

Volatility of the financial time series belongs to the crucial estimated parameters in finance (e.g. in risk management, derivative pricing). It is well known, that volatility varies in time, so that new approaches of volatility modeling have appeared. In this paper two models of the conditional...

This study explores bank´s transformation in the Czech Republic from the point of view of their profit. It considers factors that influenced domestic banks and income structure of peer groups. Under conditions of equal competition, the peer groups showed different characteristics in terms of...

Efficient Market Hypothesis has dominated the field of research on capital market theory. It postulates that asset prices are rationally connected to economic realities and always incorporate all the information available to the market. A huge quantity of theoretical works around the world have...

The article is concerned with voting indicators in the European Union. The first chapter constructs a model of voting power and defines four indicators: A. Simple relative power, B. Shapley-Shubik index, C. Banzhaf index, D. Coleman index. The second chapter defines data: the voting structure...

The authors use a variance ratio test to test the weak form of market efficiency as regards capital markets in the Czech Republic, Slovakia, Hungary, Poland, and in the United States. Market efficiency was tested using weekly and monthly values of relevant market indices in a period from 1993...

The article analyzes macroeconomic forecasts of tax revenue in the Czech Republic. Forecasts are tested for their biases on data from Czech Republic from 1993 to 2003. The authors argue that Czech tax-revenue forecasts were highly biased and the hypothesis of unbiasedness could not be rejected...

This paper studies whether the dynamic behavior of real GDP, unemployment and inflation is systematically affected by the timing of elections and by changes of governments in the Czech Republic. Two basic models of political cycles are tested – the political business cycle models and the...

This paper begins with a description of simple select models of inflation and their ability to fit the data. The paper in turn measures the stability of particular parsimonious models. One-step forecast tests are applied, which establish the instability of the money demand model compared with...