Following up on the work of Megiddo and Vazirani \cite{MV.2007}, who
determined continuity properties of equilibrium prices and
allocations for perhaps the simplest market model, Fisher's linear
case, we do the same for:
\begin{itemize}
\item
Fisher's model with piecewise-linear, concave utilities
\item
Fisher's model with spending constraint utilities
\item
Arrow-Debreu's ... more >>>

We study the structure of EG[2], the class of Eisenberg-Gale markets
with two agents. We prove that all markets in this class are rational and they
admit strongly polynomial algorithms whenever
the polytope containing the set of feasible utilities of the two agents can be described
via a combinatorial LP. ... more >>>