Diagnose Mammakarzinom

Zusammenfassung  Früh erkannt, ist Brustkrebs fast immer heilbar — 57.000 Frauen in Deutschland werden j?hrlich mit der Diagnose Brustkrebs konfrontiert, 18.000 Betroffene sterben jedes Jahr daran. Mammografie-Screening ist derzeit die einzige fl?chendeckend durchführbare Methode, die die Brustkrebssterblichkeit bei Frauen nach den Wechseljahren nachweislich senken kann. Welche Vorteile und Risiken bietet das Screeningverfahren?     

Travellers under fire: Tourists in the Tibetan uprising

Following the demonstrations in Lhasa in the fall of 1987, tourists who witnessed the events became the principal source of information to journalists denied access to Tibet and gathered material on arrests, torture, and imprisonment for human-rights organizations. A loosely knit network that arose in the first few days following the demonstrations continued to function for more than 2 years, recruiting new volunteers to take the place of those who left. Using material collected as a participant-observer among individual travelers in Tibet during 1987 and 1988, the article examines the growth of this network in terms of the response of different travel cultures to political unrest.     

A continuous time approach to the pricing of bonds

This paper develops an arbitrage model of the term structure of interest rates based on the assumptions that the whole term structure at any point in time may be expressed as a function of the yields on the longest and shortest maturity default free instruments and that these two yields follow a Gauss-Wiener process. Arbitrage arguments are used to derive a partial differential equation which must be satisfied by the values of all default free bonds. The joint stochastic process for the two yields is estimated using Canadian data and the model is used to price a sample of Government of Canada bonds.     

On the definition of Transnational Corporations in a UN Code of Conduct

The UN Commission on Transnational Corporations which was appointed by ECOSOC will have its next meeting in May. An Intergovernmental Working Group will have held ten sessions by then and present a draft Code of Conduct dealing with transnational corporations. (For a review of the state of preparations for this Code see the article by Hartmut Scheele in INTERECONOMICS No. 6/1979). The Commission itself and the Working Group have dealt more than once with the question to which enterprises the future Code is to apply but they have so far been unable to reach agreement. The difficulties are examined in the following article.