In all of this the argument runs in terms of value; but it is Mr. Clark's view, backed by an elaborate exposition of the grounds of his contention,[14] that the use of these terms of value is merely a matter of convenience for the argument, and that the conclusions so reached--the equality so established between productivity and remuneration--may be converted to terms of goods, or "effective utility," without abating their validity. Without recourse to some such common denominator as value the outcome of the argument would, as Mr. Clark indicates, be something resembling the Ricardian law of differential rent instead of a law drawn in homogeneous terms of "final productivity"; and the law of "natural" distribution would then, at the best, fall short of a general formula. But the recourse to terms of value does not, as Mr. Clark recognises, dispose of the question without more ado. It smooths the way for the argument, but, unaided, it leaves it nugatory. According to Hudibras, "The value of a thing Is just as much as it will bring," and the later refinements on the theory of value have not set aside this dictum of the ancient authority. It answers no pertinent question of equity to say that the wages paid for labor are as much as it will bring. And Mr. Clark's chapter (xxiv.) on "The Unit for Measuring Industrial Agents and their Products" is designed to show how this tautological statement in terms of market value converts itself, under competitive conditions, into a competent formula of distributive justice. It does not conduce to intelligibility to say that the wages of labor are just and fair because they are all that is paid to labor as wages. What further value Mr. Clark's extended discussion of this matter may have will lie in his exposition of how competition converts the proposition that "the value of a thing is just as much as it will bring" into the proposition that "the market rate of wages (or interest) gives to labor (or capital) the full product of labor (or capital)."