Claim: History of microeconomics (study of the behaviour of individuals in making decisions) someone had the idea of supply curve could be derived by superimposing a representative firm and market periods.
Evidence: Microeconomics is the study of the behaviour of individuals and small impacting organisations in making decisions on the allocation of limited resources. The supply curve could be derived by superimposing a representative firm supply curves for the factors of production and then market equilibrium would be given by the intersection of demand and supply curves. He also introduced the notion of different market periods: mainly short run and long run.