infonet-economy

In this article, we define the notion of a filtration and the related notion of the usual hypotheses. We then explain the problem of enlargements of filtrations: how are (semi)martingales affected under a change of filtrations? We state the main theorems in the classical frameworks of initial and progressive enlargements of filtrations. In the case of initial enlargements of...

Der Benediktinerorden hat schon früh erstaunlich ausgefeilte Führungs- und Kontrollstrukturen entwickelt und
etabliet. Wie sich Unternehmen davon inspirieren lassen können, zeigen die Autoren des folgenden Beitrages.

Hochschulen sehen sich mit immer grösseren Risiken und einem steigenden Verwaltungsaufwand aufgrund der Reformen, der steigenden Studierendenzahlen, der veränderten Finanzierungsmöglichkeiten, der Globalisierung und der Konkurrenz sowie des Technologieeinflusses konfrontiert. Doch wer hilft den Hochschulen diesen Risiken zu begegnen und auf die Veränderungen positiv zu reagieren? Das...

Switzerland introduced managed care options in its social health insurance market in order to contain health care expenditures (HCE). These capitated Managed Care plans reduce costs through gatekeeping, internal guidelines, promoting generic substitution etc. Given the cost benefits of about 62%, the crucial question for both health insurers and the legislator is whether MC plans...

This article is concerned with gradient flows in asymmetric metric spaces, that is, spaces with a topology induced by an asymmetric metric. Such an asymmetry appears naturally in many applications, e.g., in mathematical models for materials with hysteresis. A framework of asymmetric gradient flows is established under the assumption that the metric is weakly lower-semicontinuous in...

Reputation formation pervades human social life. In fact, many people go to great lengths to acquire a good reputation, even though building a good reputation is costly in many cases. Little is known about the neural underpinnings of this important social mechanism, however. In the present study, we show that disruption of the right, but not the left, lateral prefrontal cortex (PFC)...

Promises are one of the oldest human-specific psychological mechanisms fostering cooperation and trust. Here, we study the neural underpinnings of promise keeping and promise breaking. Subjects first make a promise decision (promise stage), then they anticipate whether the promise affects the interaction partner's decision (anticipation stage), and are subsequently free to keep...

Class specific mortality in 17th and 18th Century Vienna shows a cyclical pattern which is related to grain price cycles in the 5-10 years range. This relationship is not stable over time. Applying spectral analysis based on time-varying VARs, it can be shown that at the beginning of the observation period, comovement of grain prices and mortality is considerably high in areas...