This module describes a natural experiment that resulted in some groups of people getting property rights to land they were living on while others did not.
There are several papers studying the squatters natural experiment. The one we'll look at is: Galiani, Sebastian, and Ernesto Schargrodsky. "Effects of land titling on child health." Economics & Human Biology 2.3 (2004): 353-372, which can be found here: http://www.sciencedirect.com/science/article/pii/S1570677X04000541