Polarization vectors and doublet structure in planar field theory

We establish the equivalence of the Maxwell-Chern-Simons-Proca model to a d oublet of Maxwell-Chern-Simons models defined in a variety of covariant gau ges. This equivalence is shown to hold at the level of polarization vectors of the basic fields. The analysis is done in both Lagrangian and Hamiltoni an formalisms and compatible results are obtained. A similar equivalence wi th a doublet of self and anti-self dual models is briefly discussed.