Positive Externality

This website is an excellent guide to understanding externalities.

Judge quashes order to repaint London house, in win for property developer who denied choosing colour scheme out of spite

Why should nature be taken into account when looking at the economy as a whole? A Bee's Invoice uncovers and incorporates the hidden value of natural capital in the measurement of our economy.

Mike Munger discusses externalities and orange blossoms.

If Art sells potato chips to Betty, both Art and Betty are happy with the transaction. Betty has chips, and Art has been paid for them.

A brief video covering the concept of externalities.