We introduce and study the behavior of estimators of changes in the mean value of a sequence of independent random variables in the case of so called epidemic alternatives which is one of the variants of the change point problem. The consistency and the limit distribution of the estimators developed for this situation are shown. Moreover, the classical estimators used for ‘at most change’ are e...

I outline the evidence pertinent to the connection between the nova explosion and mass transfer rates in CVs. I conclude that there is still insufficient evidence to decide whether or not such a connection exists.

Context is a concept used by philosophers and scientists with many different definitions. Since Dummett, we speak of the "context principle" in Frege and Wittgenstein: "An expression has a meaning only in the context of a sentence". The context principle finds an extension in some of Wittgenstein's ideas, especially in his famous passage where he says that " to understand a sentence means to un...

Public debt management, in the sense of manipulation of a given stock, has been a policy problem at least since World War II. During this time, dissatisfaction with the handling of the debt has surfaced sporadically. A feeling that the average maturity of the debt should be longer than it was has been pervasive. But no generally accepted philosophy of the public debt management has emerged. Var...

Correlation is a mine eld for the unwary. One does not have to search far in the literature of nancial risk management to nd misunderstanding and confusion. This is worrying since correlation is a central technical idea in nance. Correlation lies at the heart of the capital asset pricing model (CAPM) and the arbitrage pricing theory (APT), where its use as a measure of dependence between nancia...