## 5/26/2017

Journal Guidelines for EHP from their official website

• EHP will consider papers from dissertations that have been published in their entirety by a university in partial fulfillment of a degree.
• For each manuscript, authors must submit a competing financial interests declaration form. On top of that, authors need to FURTHER indicated in the acknowledgement section.
• For research articles, the word count is 7000, excluding references tables figures and acknowledgements and supplementary information. No way I am going to go over that.
• Line number is mandatory!
• Acknowledgements should be on the first page not last
• They want a shorter title beside the long title, need to think about it.
• Abstract needs to be equal or less than 250 words, structured with labels: background, objective, methods, results, conclusions
• Main text has labels: introduction, methods, results, discussions, and conclusions. All subsection title needs to be fewer than 8 words.
• References, Tables, and Figure Legends needs to be following the main text. Figures and supplementary material will be provided as separate files.
• All references need to be author year. List alphabetically.
• Do not use foot notes.
• Confidence interval must be in the same column as the point estimation.

## 5/24/2017

Today I learned that

• Conditional Logistic Regression model with time-varying independent variables can be implemented through Cox proportional hazard function ‘coxph’ in combination with a survival object Surv. Always have wondered about this.

## 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}.