This article discusses whether the Japanese government should break up NTT (Nippon Telegraph & Telephone) in 1995, as the U.S. federal government compelled AT&T (American Telephone & Telegram) to break itself into toll and local telephone companies in 1984. The divestiture of NTT has long been a...

Th is paper presents electronic tool to support farmers in fertilization planning. It is developed as a spreadsheet model, utilizing optimization potential of mathematical programming techniques. Described problem of fertilization planning is rather simple from technological-expert viewpoint,...

In this paper we will discuss the problem of the desired level of accuracy in model specification. In particular we will look at the effect of various polynomial representations of the yield curve on the tilting of medium to long term bond portfolios. As will be seen, the tilting of these...