A new type of cyclic activity graph is introduced. In contrast to the well-known "start-after-end" type with only one backward arrow, the new one admits several backward arrows representing the removal of working groups from the n-th to the (n + 1)-th cycle (e.g., from the previous family house...

There is a need to focus on electricity derivative trading, because this is an important and expanding field. The aim of this paper is long-term forecasting of the daily futures prices. Two approaches were used for this, namely the use of spot price forecasting to model the future prices and...

The paper deals with the state and development of knowledge economy in Central and Eastern European (CEE) countries and its contribution to national competitiveness. The main goal is to discuss whether a relationship between the level of knowledge economy and macroeconomic competitiveness can be...