Am 01.07.2010 02:16, schrieb Allin Cottrell: Hold on a sec -- that's what the other submenu entry in /Variable/Spectrum below "periodogram" is and has always been for, no? The periodogram itself of course doesn't have any smoothing, so no bandwidth. Though I guess one could argue to substitute the two-item submenu under /Variable/Spectrum with a single dialog offering the choice instead. I don’t think so because, while in the periodogram you select the bandwidth of the semiparametric estimators, in the spectrum you choose the bandwidth to smooth the periodogram. They are different concepts. Cheers Javi