diff --git a/Week 2- Representative Consumer and Bertrand/representative_consumer.tex b/Week 2- Representative Consumer and Bertrand/representative_consumer.tex
index 507e8ff..0614af4 100644
--- a/Week 2- Representative Consumer and Bertrand/representative_consumer.tex	
+++ b/Week 2- Representative Consumer and Bertrand/representative_consumer.tex	
@@ -58,7 +58,7 @@
 \end{frame}
 
 \begin{frame}{Brief Aside: Constant Elasticity Demand}
-Using the overall price index $P =\left( \int_{0}^J  p(\omega_1)^{1-\sigma}  d\, \omega_1 \right)^{\frac{1}{\rho}}$, we can re-write Marshallian demand:
+Using the overall price index $P =\left( \int_{0}^J  p(\omega_1)^{1-\sigma}  d\, \omega_1 \right)^{\frac{1}{1-\sigma}}$, we can re-write Marshallian demand:
 \begin{eqnarray*}
 q(\omega) &=& p(\omega)^{-\sigma} P^{\sigma-1} I = \left(\frac{p(\omega)}{P}\right)^{-\sigma}  \frac{I}{P}
 \end{eqnarray*}