Friday, February 18, 2011

Unit 1: Positive externalities from mroof tiles!

Thanks to tutor2u for this story

http://www.tutor2u.net/blog/index.php/economics/comments/great-example-of-a-product-with-positive-externalities/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+economics_news+%28tutor2u+Economics+Blog%29#When:03:19:00Z

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