Kernrechtsfrage
Whether the comparison of incomes for the 2004 reference year was correctly made for AI pension purposes.
Extrahierter Entscheid
The comparison had to be made with reference to 2004, the year the pension right arose; no later deterioration was proven.
Extrahierte Begründung
The court held that the relevant moment is the birth of the right to pension, and there was no proof that circumstances changed between March 2004 and the opposition decision in December 2006 in a way affecting entitlement.