Kernrechtsfrage
Whether the Bern compensation office remained competent to determine and pay supplementary benefits from 1 January 2008.
Extrahierter Entscheid
For home, hospital, or institutional stays, the relevant EL competence depends on the last canton of residence before entry; the lower courts had not examined whether the claimant still had an EL-relevant home stay after 1 January 2008.
Extrahierte Begründung
Art. 21(1) ELG makes a stay in an institution irrelevant for creating new EL competence. The decisive question was therefore not civil-law domicile in Thurgau, but whether the claimant continued to be treated as a home resident for EL purposes. The file was not ready for judgment on that point.