What's New in April, 2009?

SAS

• Code fragment: Random effect Tobit model in nlmixed
• FAQ: How can I bootstrap estimates in SAS?

Stata

• FAQ: How can I understand a categorical-by-categorical interaction in logistic regression?
• FAQ: How can I understand a categorical-by-continuous interaction in logistic regression?
• FAQ: How can I read binary data in Stata?

SPSS

• FAQ: How can I perform hypothesis tests in glm?
• Library: Inputting and manipulating dates in SPSS?

What's New in March, 2009?

General

• Frequently Asked Question: What's with the different formulas for kurtosis?

R

• Frequently Asked Question: How can I generate a Venn diagram in R?

SAS

• Textbook Example: Applied Longitudinal Data Analysis, Chapter 2 (Using 9.2)
• Textbook Example: Applied Longitudinal Data Analysis, Chapter 3 (Using 9.2)
• Textbook Example: Applied Longitudinal Data Analysis, Chapter 4 (Using 9.2)
• Textbook Example: Applied Longitudinal Data Analysis, Chapter 5 (Using 9.2)
• Textbook Example: Applied Longitudinal Data Analysis, Chapter 6 (Using 9.2)
• Frequently Asked Questions: How do I write out a fixed-format file in SAS?

Stata

• Frequently Asked Question: How can I analyze multiple mediators in Stata?
• Frequently Asked Question: How can I do moderated mediation in Stata?
• Frequently Asked Question: How can I compute effect size for regression in Stata?
• Frequently Asked Question: How can I get an R-squared with robust regression in Stata?
• Frequently Asked Question: How can I use xtline in Stata?
• Frequently Asked Question: How can I get a Somers' D after logistic regression in Stata?
• Frequently Asked Question: How can I create all pairs within groups in Stata?
• Stata Code Fragment: How can I generate automated filenames in Stata?