Resummation, Power Corrections and Prediction in Perturbative QCD

Abstract

I give a pedagogical introduction to resummation and power corrections, using the thrust variable in electron-positron annihilation as an example, followed by an discussion of issues of predictability in perturbative QCD.

Comments: 13 pages. This preprint summarizes two presentations at QCD and High Energy Hadronic Interactions, XXXIIIrd Rencontres de Moriond, Les Arcs, Savoie, France, 21-28 March, 1998