I present a brief survey of important recent developments in the quantum Ha
ll effect. The review covers both fractional and integer regimes, from an e
xperimentalist's perspective. The topics include direct measurements of fra
ctional charge, composite fermion Fermi surface, spin textures, and edge st
ate (chiral Luttinger liquid) dynamics. (C) 2000 Elsevier Science B.V. All
rights reserved.