yes there enters short term ambiguity how much of a firms period VA is price change and how much sold output change remains uncertain
and of course the overall system's VA ( TVA)
shares this dP / dQ uncertainty
but remember its hooked into a policy smart path
the dQ target this period is an automatic function of a maximal jobs calculation
which is very unlikely to see quick flux
in as much as the target dP implicit in a paine rule reflects
the gap between Tq real and Q desired thru target path for jobs (N)
now the policy response is explicit and publicly known
and determined automatically by the real state of the targeted variable
again uncertainty is met by feed back
this is a process well understood by all agents
more later
