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\begin{thebibliography}{}

\harvarditem[Grossman and Shapiro]{Grossman and Shapiro}{1984}{gs}
\textsc{Grossman, G.,  {\small and} C.~Shapiro}  (1984): ``Informative
  Advertising with Differentiated Products,'' \emph{Review of Economic
  Studies}, 51, 63--81.

\harvarditem[Kihlstrom and Riordan]{Kihlstrom and
  Riordan}{1984}{kihlstrom_riordan}
\textsc{Kihlstrom, R.,  {\small and} M.~Riordan}  (1984): ``Advertising as a
  Signal,'' \emph{Journal of Political Economy}, pp. 427--450.

\harvarditem[Stigler]{Stigler}{1964}{stiginfo}
\textsc{Stigler, G.}  (1964): ``The Economics of Information,'' \emph{Journal
  of Political Economy}.

\end{thebibliography}
