, ▁and ▁when ▁demand ▁and ▁prof its ▁are ▁low , ▁capital ▁moves ▁elsewhere . ▁Thus , ▁supply ▁and ▁demand ▁are ▁recon ci led , ▁however ▁imper fect ly , ▁by ▁the ▁in cess ant ▁migr ations ▁of ▁capital ▁across ▁the ▁economy . ▁Yet , ▁Marx ▁arg ues , ▁this ▁whole ▁process ▁is ▁never theless ▁still ▁reg ulated ▁by ▁the ▁law ▁of ▁value ; ▁ultimately , ▁relative ▁price ▁movements ▁for ▁products ▁are ▁still ▁determined ▁by ▁compar ative ▁exp end it ures ▁of ▁labour - time . ▁Thus , ▁market ▁prices ▁for ▁outputs ▁will ▁grav itate ▁towards ▁prices ▁of ▁production ▁which ▁themselves ▁are ▁const rained ▁by ▁product - values ▁express ible ▁in ▁quantities ▁of ▁labour - time . ▁ ▁Law ▁of ▁value ▁and ▁cr ises ▁ ▁In ▁serious ▁economic ▁cr ises , ▁Marx ▁suggests , ▁the ▁structure ▁of ▁market ▁prices ▁is ▁more ▁or ▁less ▁suddenly ▁read just ed ▁to ▁the ▁evol ving ▁underlying ▁structure ▁of ▁production ▁values . ▁The ▁economic ▁crisis ▁means ▁that ▁price ▁and ▁value ▁relationships ▁have ▁got ten ▁badly ▁out ▁of ▁kil ter , ▁causing ▁a ▁break down ▁of ▁the ▁normal ▁trad ing ▁process . ▁According ▁to ▁Marx , ▁the ▁basic ▁meaning ▁of ▁cr ises ▁for ▁capital ists ▁was , ▁that ▁they ▁could ▁not ▁longer ▁invest ▁their ▁capital ▁at ▁an ▁ade qu ate ▁profit ▁income , ▁which ▁usually ▁meant ▁also ▁that ▁their ▁capital ▁lost ▁part ▁of ▁its ▁value . ▁For ▁workers , ▁cr ises ▁meant ▁an ▁increase ▁in ▁un emp loyment , ▁and ▁w age - cut s . ▁Some ▁output ▁and ▁assets