Reminder

Use these posts to write something on Pigouvian taxes (and learn how to spell that word while you're at it!):

http://blog.greens.org.nz/index.php/2006/04/12/the-polluted-hand-of-the-market/
http://tvhe.wordpress.com/2008/05/06/why-is-the-nz-government-buying-the-rail-lines/
http://capitalismbad.blogspot.com/2006/04/invisible-hand.html