The MSSM at present and future colliders

A brief overview over the phenomenology of the MSSM at present and future colliders is given. The complementarity of indirect tests of the model via precision observables and of the information from the direct production of SUSY particles is emphasized. If the lightest Higgs boson of the MSSM will be detected, its mass will also play an important role as a precision observable.Comment: 3 pages, 3 figures, to appear in the proceedings of the International Europhysics Conference on High Energy Physics, Tampere, July 199

Belgrade - New Impressions

Questions to and Replies by Prof. Dr. Georg Meggle, Leipzig Oct 18th 200

The Impact of the Internet on Retail Competition: Evidence from Technological Differences in Internet Access

Does the internet increase competition? To address this question, I exploit two institutional details unique to Germany: (1) Some municipalities received glass fibre cables that cannot be upgraded to DSL; I use these municipalities as a treatment group with reduced online competition. (2) German law mandates resale price maintenance for books; I compare three retailing sectors, electronics (price competition), books (no price competition), and food (no online sales), to identify the effect of price competition: The effect of price competition is highly significant. Full broadband access reduces offline electronics retailers’ producer rents by 1.5 percent per year from 1999 to 2007