Like Jevons , Marshall did not see an explanation for supply in the theory of marginal utility .
Marshall synthesized an explanation of demand thus explained with supply explained in a more classical manner , determined by costs which were taken to be objectively determined .
Like Jevons , Marshall did not see an explanation for supply in the theory of marginal utility , so he synthesized an explanation of demand thus explained with supply explained in a more classical manner , determined by costs which were taken to be objectively determined .