Venn Diagrams and Regression Analysis

Prosa Econômica (a Brazilian econ blog) has written a nice post (Part 1 and 2) on how to use the Venn diagram to teach regression analysis. A walk in the park!

This idea is discussed in a 2002 paper by Peter E. Kennedy. You may read the paper here.

* I saw this at Bernardo L Queiro'z twitter!