H. P. Grice, "The principle of economy of rational effort"

οἰκονομ-ικός , ή, όν, A.practised in the management of a household or family, opp. πολιτικός, Pl.Alc.1.133e, Phdr.248d, X.Oec.1.3, Arist.Pol.1252a8, etc. : Sup., [κτημάτων] τὸ βέλτιστον καὶ-ώτατον, of man, Phld.Oec.p.30 J. : hence, thrifty, frugal, economical, X.Mem.4.2.39, Phylarch.65 J. (Comp.) : ὁ οἰ. title of treatise on the duties of domestic life, by Xenophon ; and τὰ οἰ. title of treatise on public finance, ascribed to Aristotle, cf. X.Cyr.8.1.14 : ἡ -κή (sc. τέχνη) domestic economy, husbandry, Pl.Plt.259c, X.Mem. 3.4.11, etc. ; οἰ. ἀρχή defined as ἡ τέκνων ἀρχὴ καὶ γυναικὸς καὶ τῆς οἰκίας πάσης, Arist.Pol.1278b38 ; applied to patriarchal rule, ib.1285b32. Adv.“-κῶς” Ph.2.426, Plu.2.1126a ; also in literary sense, in a well ordered manner, Sch.Th.1.63.