May be I´m wrong, but I suppose that Theil statistics need ordered data to compute Yt-Yt-1. But perhaps I´m missing something. Thanks ________________________________ De: Sven Schreiber <svetosch(a)gmx.net&gt; Enviado: mércores, 3 de marzo de 2021 13:27 Para: gretl-devel(a)gretlml.univpm.it <gretl-devel(a)gretlml.univpm.it&gt; Asunto: [Gretl-devel] Re: Theil's U1 for fcstats (reloaded) Am 03.03.2021 um 11:54 schrieb ESTEVEZ NUÑEZ JUAN CARLOS: ... and talking about this, may be a good chance to review what´s the sense of gretl to show Theil statistic in forecast output, with cross-section data. 🙂 If there's any problem, you don't have to wait for somebody else to start a topic where the keyword appears :-) It's always best to start a new thread for a different topic. But anyway, can you give an example of what you mean? thanks sven