  Precision electroweak measurements at LEP currently check the validity of the
Standard Model to about one part in a thousand. Any successful model of physics
beyond the Standard Model must be consistent with these observations. The
impact of radiative corrections on the Minimal Supersymmetric Model (MSSM) is
considered. The influence of supersymmetric particles on precision electroweak
measurements is generally negligible since radiative corrections mediated by
supersymmetric particles are suppressed by a factor of order $m_Z^2/M_{\rm
SUSY}^2$ (where $M_{\rm SUSY}$ is the scale characterizing the scale of
supersymmetric particle masses). However, there are a few pertinent exceptions.
For example, the radiative corrections to the rare decay $b\to s\gamma$ from
charged Higgs and supersymmetric particle exchange can be of the same order as
the Standard Model contribution. Large radiative corrections also lead to
modifications of MSSM tree-level (natural) relations. The largest corrections
of this type occur in the MSSM Higgs sector and are enhanced by powers of the
top quark mass. The consequences of the radiatively corrected MSSM Higgs sector
are briefly discussed.
