New and Old Jet Clustering Algorithms for Electron-Positron Events
  Over the years, many jet clustering algorithms have been proposed for the analysis of hadronic final states in $e^+e^-$ annihilations. These have somewhat different emphasis and are therefore more or less suited for various applications. We here review some of the most used and compare them from a theoretical and experimental point of view. 
Stefano Moretti (RAL), Leif L\"onnblad (Lund) and Torbj\"orn   Sj\"ostrand (Lund)