Hi, the short chapter 10 of the guide says that "genr" is documented in the command reference, but there there's a warning that "for comprehensive and updated info on this command you’ll want to refer to chapter 10 of the Gretl User’s Guide". Also it's not clear to me how the sections in ch. 10 actually constitute "special functions in genr"; they're about the long-run variance in a totally separate function lrvar(), about the cdf() and pvalue() functions, and finally about fft() and ffti(). It looks like a relatively random selection of a few built-in functions that get some extra explanations there. So instead of being in part I of the guide "Running the program" shouldn't those things be moved to somewhere in part II "Econometric methods" ? Another suggestion would be to move or copy the stuff about "genr time", "genr dummy", "genr unitdum" and "genr timedum" from the command reference to that special-genr-functions chapter 10 of the guide. cheers sven