Sal Khan
This tutorial starts with a very micro view of when firms decide to raise (or lower prices). It then jumps back to the macro view to discuss how capacity utilization can impact prices. Source: Khan Academy (www.khanacademy.org), used under the Creative Commons Attribution-NonCommercial-ShareAlike (CC BY-NC-SA) license. All Khan Academy content is available for free at www.khanacademy.org. Khan Academy does not endorse the World Public Library.
Read this work at the World Public Library (library card needed).