During the last few years the Czech Republic has witnessed a great boom in the area of a problematic and irrecoverable credit settlement. Late and substandard payments have become rather a tradition in the Czech way of doing business. Consequently the solution by selling receivables to the third...

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...