  We study ergodic-theoretic properties of coded shift spaces. A coded shift
space is defined as a closure of all bi-infinite concatenations of words from a
fixed countable generating set. We derive sufficient conditions for the
uniqueness of measures of maximal entropy and equilibrium states of Hoelder
continuous potentials based on the partition of the coded shift into its
concatenation set (sequences that are concatenations of generating words) and
its residual set (sequences added under the closure). In this case we provide a
simple explicit description of the measure of maximal entropy. We also obtain
flexibility results for the entropy on the concatenation and residual sets.
Finally, we prove a local structure theorem for intrinsically ergodic coded
shift spaces which shows that our results apply to a larger class of coded
shift spaces compared to previous works by Climenhaga, Climenhaga and Thompson,
and Pavlov.
