4 ECONOMIC ESSAYS IN HONOR OF JOHN BATES CLARK and literally to think his way through mass and detail to what seemed to him absolute verities. In the inveterate quality of his reasoning, in the resistless force of his penetration, in the logical symmetry of his conclusions there is something reminiscent of Ricardo. Coming at a time when spadework threatened to dispossess architecture, this reassertion of the scope and calibre of the economist’s task infused life into automatism. If, thereafter, the mantle proved too ample for narrower shoulders, if thought yielded to commentation, text- writing and hypercriticism—such is the price of rebound. Clark drew aside the curtain and American economists from his day have been stirred—and lashed—by the vista beyond. The positive contributions of Clark to American economic thinking will reflect, in estimate, the personal reactions of the reviewer. Not enough time has passed for a final precipitate, and gradation is bound to vary with interest and response. At least one student has found chief aid in Clark’s underlying distinction between “static” and “dynamic” in economic abstrac- tions. Tracing back, subconsciously, to Adam Smith’s “station- ary” in contrast to “declining” or “progressive” state of society— Clark’s alignment, sharply defined and amply expounded, cleared the ground at the very outset for orderly analysis. More than any single concept it has rid the area of American economic philosophy of the twin “idols” of social speculation—varying assumption and unexpressed implication. As an intellectual achievement Clark’s construct of “the ultimate standard of value”’—expounded to a small company of students at the Johns Hopkins University in 1892, set forth in a classic paper in the Yale Review in the same year, and incorporated in The Distribution of Wealth in 1899—is likely to be given first place. A tour de force in pure reasoning, its scientific place is distinguished. Eighty years before, Ricardo had reluctantly admitted “the non-existence of any measure of abso- lute value,” adding “there is not and can not be an accurate measure of value, and [that] the most that any man can do is to find out a measure of value applicable in a great many cases, and not very far deviating from accuracy in many others.” Ricardo’s frank agnosticism was succeded by a half century of thinly veiled empiricism. The post-classicists illumined the gap