Lately I have been writing a lot of modular Stata code, where bits and pieces of the job are done by separate programs, sometimes declared in different do-files (called in with do). You get programs to pass on things to each other by making them rclass. Now, r() results can be scalars as in this [...]

A little over a year into my Stata 10 license, I can see some usage patterns over the two feet's worth of Stata documentation: Data Management and Programming are pretty well worn, the rest not so much. User's Guide,  [U], has been among the least popular, which is a pity, because chapter 18, Programming Stata, [...]