What's New in January, 2010?

R

• FAQ: How can I format a string containing a date into R "Date" object?
• Textbook Example: Multilevel Analysis Techniques and Applications by Joop Hox, Chapter 7

SAS

• FAQ: How can I create contrasts with proc logistic?

Stata

• FAQ: How can I use the margins command with a 3-way anova interaction? (Stata 11)
• FAQ: How can I do anova contrasts using the margins command? (Stata 11)
• FAQ: Why doesn't the margins command work with a nested factor in anova? (Stata 11)