In this paper we present a new approach to integration and cointegration. We show that a periodically correlated time series can be divided in a natural way into subseries that are integrated. Moreover, with high probability they are cointegrated. Therefore it is enough to show periodic...

Celem niniejszego artykulu jest przedstawienie argumentow mogacych sklonic inwestorow do zwiekszenia zainteresowania inwestowaniem w sposob odpowiedzialny. Poprzez analize zdolnosci do generowania wartosci dla akcjonariuszy oraz jej stabilnosci w warunkach ograniczonego dostepu do finansowania...

The paper presents empirical results on the discounting of delayed payoffs which show that: (1) the best approximation of the discounting process is a hyperbolic function, (2) (both animals and humans) can reverse their preferences in time. The article presents theoretical conditions on the...