Title:Microeconometrics Using Stata, Revised Edition
Authors:Sophia Rabe-Hesketh and Anders Skrondal  
Publisher: Stata Press  
Copyright: 2012

Title：Multilevel and Longitudinal Modeling Using Stata, Third Edition
Authors:Sophia Rabe-Hesketh and Anders Skrondal  
Publisher: Stata Press  
Copyright: 2012