kotitalouksin
Kotitalouksin is a Finnish inflected form of the noun kotitalous, which means household or domestic unit. In standard modern Finnish, the genitive plural that denotes “of households” is kotitalouksien. The form kotitalouksin is not commonly used as a standalone term in contemporary Finnish and may appear only in older texts, dialectal usage, or as a nonstandard variant.
In statistics and policy, households are the basic unit of analysis. Data are typically reported for kotitaloudet
Grammatical note: kotitalous is a compound of koti (home) and talous (economy/management). The standard genitive plural