With one variable, that's easy enough: count if missing(variable-name). If you have several variables, you can put them in a foreach loop. But if you have to do this for arbitrary lists of variables in several files, it may be interesting to package that foreach loop inside a quick command that might handle special display [...]

Last week I mentioned that in the course of switching from Notepad++ to Vim I lost the ability to run Stata do-files or selected lines from within the text editor, and I asked my readers for help if they had a solution. What do you know, one of them did, and wrote to me all [...]