Introduction to Economic Analysis is a university microeconomics textbook by Caltech Professor Preston McAfee.

[1] It is available free of charge under Creative Commons license[2] (an open source); under this "license that requires attribution, users can pick and choose chapters or integrate with their own material".

[3] Introduction to Economic Analysis was the first published complete textbook being openly available online.

[3] McAfee was named SPARC innovator for the year 2009 for making the book freely accessible.

[3] A revised edition, coauthored with Tracy Lewis of the Fuqua School of Business, was published by Flat World Knowledge and is available online from McAfee's website.