  We present UBVRIJHK polarization and flux density observations of the quasar
3C 273 obtained during a time of outburst over two weeks in 1988 February. We
have modelled these data with two power law components, each with
wavelength-independent position angle. These components are roughly
perpendicular. The steeper-spectrum component has higher infrared polarized
flux density, with the electric vector approximately transverse to the
projected direction of the VLBI jet. The K-band polarized flux density and
position angle, and possibly the spectral index of the two components, are
correlated with a time lag of less than a day. We explain our results in terms
of a shocked jet model with two nearly co-spatial components: a shock component
with magnetic field approximately perpendicular to the jet and the other with
magnetic field approximately parallel to the jet.
