Stang’s law (more rarely called Ivšić’s law) is the supposed retraction of the long internal circumflex in Common Slavic that, according to many accentologists of the post-Stang era, accounts for most neo-acute stem-stressed forms in accentual paradigm b (a.p. b). Thus, attested a.p. b forms like present *mõltite ‘you thresh-2.pl’ and *pòpěxъ ‘priests-loc.pl’ (see “Accentology”) would originate in preforms like *moltîte, *popě̂xъ.
Ivšić (1911: 169–170, 177–182) was the first one to propose a retractional nature of the Slavic neo-acute in forms like *mõltite. However, it was S…