The running of neutrino parameters in see-saw models and its implications for
leptogenesis and for testing predictions of mass models with future precision
experiments are discussed using analytical approximations as well as numerical
results.Comment: 5 pages, 2 figures; talk presented at 10th International Symposium on
Particles, Strings and Cosmology (Pascos04), Northeastern University, Boston,
August 16-22, 2004; references adde