deletions | additions       diff --git a/Lecture_7_Externalities_this_is__.md b/Lecture_7_Externalities_this_is__.md  index e1c1161..c6ceb00 100644  --- a/Lecture_7_Externalities_this_is__.md  +++ b/Lecture_7_Externalities_this_is__.md 
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Unregulated equilibrium in the electricity market (note that private cost ultimately comes back to people's valuations of eg. work time)  Google suggests this version of the same graph as was shared in the lecture  https://marketmonetarist.files.wordpress.com/2013/02/minimum-wage.png  Can any bright sparks draw the dots? Sorry make the connections, or something in between... 
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