  Based on the notion of Stark units we present a new approach that obtains
refinements of log-algebraic identities for Anderson t-modules. As a
consequence, we establish a generalization of Chang's theorem on logarithmic
interpretations for special characteristic p multiple zeta values (MZV's) and
recover many earlier results in this direction. Further, we devise a direct and
conceptual way to get logarithmic interpretations for both MZV's and v-adic
MZV's. This generalizes completely the work of Anderson and Thakur for Carlitz
zeta values.
