# 5/18/2017

Statistical Method

• Regression Discontinuity and Interrupted Time Series analysis has long confused me. I found a presentation of University of Washington that discusses the differences. It is almost the only place that I found this information.  It seems like the biggest difference is that ITS relies on population data and RD on individual data. Overall RD is more robust than ITS.

Latex

• Conditional equations in Latex. Answers from here.
• $f(x)= \begin{cases} \frac{x^2-x}{x},& \text{if } x\geq 1\\ 0, & \text{otherwise} \end{cases}$

However, This code generate equation without numbering. To change it, we remove $$$and$$$$$and$$replace with $$and$$. Another thing to modify is when we write functions this why, the format of \sum becomes its in-line format – the beginning$$and$$end of the range of independent variable appears to the right of the capital sigma. To change that, use \sum\limits_{i=1}^{m_y} instead of \sum_{i=1}^{m_y}.