Supersymmetry and Higgs Boson Phenomenology =========================================== Marcela Carena (CERN) Abstract: --------- I shall discuss theoretical aspects relevant for Higgs boson searches at LEP, Tevatron and LHC, placing special emphasis on the radiative effects which can affect the Higgs boson sector of the Minimal Supersymmetric Standard Model (MSSM). I shall analyze regions of MSSM parameter space for which the production and/or decay mechanisms, in at least one of the colliders, can be particularly difficult. This permits to show the complementarity of the three colliders in the search for a light Higgs boson which plays a relevant role in the mechanism of electroweak symmetry breaking.