Key points are not available for this paper at this time.
Introduction, 402. — I. Suggested new definitions, 404. — II. Clark's treatment of sectors, 406. — III. Fisher's approach, 409. — IV. Fourastié's definition, 412. — V. Strengths and weaknesses of suggested new definitions, 414. — VI. Conclusion, 419.
Martin Wolfe (Mon,) studied this question.