This paper presents a reformulated concept of value consistent with Ma
rx's approach. The relation between such values and competitive prices
is shown to have novel and symmetric characteristics. A new sort of t
ransformation algorithm is proposed: first, use values to transform th
e conditions of production to create a hypothetical 'standard technolo
gy', in which each commodity is allocated a proportional share of the
aggregate inputs; then, solve for production prices simply by calculat
ing the labour directly and indirectly embodied under standard technol
ogical conditions. Competitive prices thus represent the 'average labo
ur' contained in commodities, where averaging takes place across indus
try boundaries.