# How does the self-corecting mechanism put the economy back to long run equilibrium following a negative shock on the stick-wage SRAS?

According to some lecture notes, apparently it is possible for the economy to return to long run equilibrium if via the self-correcting mechanism if there is a temporary shock to the stick wage (horizontal) SRAS. I believe the situation can be graphed as below (SRAS shifting to SRAS1).

The problem is I don't see an explanation as to how it will return to long run equilibrium ($Y_f$), other than to let labour markets adjust itself over long periods of time??