This paper studies the effects of generic drugs in the pharmaceutical industry. Two firms produce two branded goods, with a different active ingredient, and the patent for one of them has expired, so that a generic alternative is in the market. This paper focuses on the case where the branded goods are perfect substitutes and where there exists a degree of… (More)

The IAU Working Group on Precession and the Equinox looked at several solutions for replacing the precession part of the IAU 2000A precession–nutation model, which is not consistent with dynamical theory. These comparisons show that the (Capitaine et al., Astron. Astrophys., 412, 2003a) precession theory, P03, is both consistent with dynamical theory and… (More)

Highly accurate long-term numerical integration of nearly oscillatory systems of ordinary differential equations (ODEs) is a common problem in astrodynamics. Scheifele’s algorithm is one of the excellent integrators developed in the past years to take advantage of special transformations of variables such as the K-S set. It is based on using… (More)