Consider adding a "Case studies" section of articles

[mccarthy-m-g]

The motivation behind this idea is the depression_unemployment data. Although it was only used by Singer and Willett in chapter 5 to demonstrate the multilevel model for change, the data contains information such that it could also be used for survival analysis---indeed,in Ginexi and colleagues' study, they actually did fit use both multilevel models and survival analysis. It would be educational to have an article demonstrating this.

This might also be sufficient as a tips and tricks article.

[mccarthy-m-g]

Another topic: Longitudinal data validation (with the {pointblank} package). This could go over some of the unique aspects of longitudinal data that are important to check for, such as:

• Subsequent measurement occasions happening later in time (no one ever jumps back in time)
• The number of measurements per person
• The time of measurements, and/or the time between measurements