Abstract
We present models in which the observed fermion masses and
mixings are generated by dynamically localizing the three generations
of matter in a flat compact extra dimension. We first construct
models assuming the hierarchy problem is addressed by the existence of
large extra dimensions, i.e. the fundamental scale is not far above a
TeV and supersymmetry is not imposed. These models are compactified,
chiral, and don't require fine-tuning to generate the top mass.
Limits on the compactification scale based on flavor-changing neutral
currents are relaxed compared to those on existing models. We then
supersymmetrize some of these models. Using 
= 1 superspace language
in extra dimensions, we find space-dependent flat directions which can
be used to localize fields. Finally, we discuss methods of breaking
supersymmetry and the impact of these models on the superpartner
spectrum.