There is such a thing as a general rise of prices. All commodities may rise in their money price. But there can not be a general rise of values. It is a contradiction in terms. A can only rise in value by exchanging for a greater quantity of B and C; in which case these must exchange for a smaller quantity of A. All things can not rise relatively to one another. If one half of the commodities in the market rise in exchange value, the very terms imply a fall of the other half; and, reciprocally, the fall implies a rise. Things which are exchanged for one another can no more all fall, or all rise, than a dozen runners can each outrun all the rest, or a hundred trees all overtop one another. A general rise or a general fall of prices is merely tantamount to an alteration in the value of money, and is a matter of complete indifference, save in so far as it affects existing contracts for receiving and paying fixed pecuniary amounts. Before commencing the inquiry into the laws of value and price, I have one further observation to make. I must give warning, once for all, that the cases I contemplate are those in which values and prices are determined by competition alone. In so far only as they are thus determined, can they be reduced to any assignable law. The buyers must be supposed as studious to buy cheap as the sellers to sell dear. The reader is advised to study the definitions of value given by other writers. Cairnes(190) defines value as “the ratio in which commodities in open market are exchanged against each other.” F. A. Walker(191) holds that “value is the power which an article confers upon its possessor, irrespective of legal authority or personal sentiments, of commanding, in exchange for itself, the labor, or the products of the labor, of others.” Carey(192) says, “Value is the measure of the resistance to be overcome in obtaining those commodities or things required for our purposes—of the power of nature over man.” Value is thus, with him, the antithesis of wealth, which is (according to Carey) the power of man over nature. In this school, value is the service rendered by any one who supplies the article for the use of another. This is also Bastiat’s idea,(193) “_le rapport de deux services échangés_.” Following Bastiat, A. L. Perry(194) defines value as “always and everywhere the relation of mutual purchase established between two services by their exchange.” Roscher(195) explains exchange value as “the quality which makes them exchangeable against other goods.” He also makes a distinction between utility and value in use: “Utility is a quality of things themselves, in relation, it is true, to human wants. Value in use is a quality imputed to them, the result of man’s thought, or his view of them. Thus, for instance, in a beleaguered city, the stores of food do not increase in utility, but their value in use does.”