I discuss soft-gluon resummation and power corrections for event shape
distributions, mostly in e+ e- annihilation. I consider specifically the
thrust, the C parameter, and the class of angularities, and show how
factorization techniques and dressed gluon exponentiation lead to predictive
models of power corrections that are firmly grounded in perturbative QCD. The
scaling rule for the shape function for angularities is derived as an example.
Finally, I make a few remarks on possible generalizations to hadron collisions,
and on their relevance to LHC studies.Comment: 10 pages, contribution to the FRIF workshop on first principles
non-perturbative QCD of hadron jets, LPTHE, Paris, France, 12-14 Jan 200
