  In this paper we use all available baryon acoustic oscillation, Hubble
parameter, and quasar angular size data to constrain six dark energy
cosmological models, both spatially flat and non-flat. Depending on the model
and data combination considered, these data mildly favor closed spatial
hypersurfaces (by as much as $1.7\sigma$) and dark energy dynamics (up to a
little over $2\sigma$) over a cosmological constant $\Lambda$. The data also
favor, at $1.8\sigma$ to $3.4\sigma$, depending on the model and data
combination, a lower Hubble constant than what is measured from the local
expansion rate.
