Chern-Simons-like Gravity Theories
  A wide class of three-dimensional gravity models can be put into "Chern-Simons-like" form. We perform a Hamiltonian analysis of the general model and then specialise to Einstein-Cartan Gravity, General Massive Gravity, the recently proposed Zwei-Dreibein Gravity and a further parity violating generalisation combining the latter two. 
Eric A. Bergshoeff, Olaf Hohm, Wout Merbis, Alasdair J. Routh and Paul   K. Townsend
hep-th