Kernrechtsfrage
Whether the cantonal court erred by not performing a loss-of-income comparison for the period before July 2002
Extrahierter Entscheid
Yes. Full work capacity in adapted work did not by itself exclude reduced earning capacity; the income comparison had to be performed.
Extrahierte Begründung
The cantonal court violated federal law by assuming sufficient earning capacity without calculating the disability degree for the earlier period.