Significance of cost analysis for economic theory, 507. — Analysis of commercial costs, 508. — Bearing on price policy, 511. — Devices resorted to: brands, cooperative arrangements, 511. — Analysis of manufacturing costs, 514. — Machine rate analysis, prime cost, additional cost, 514. — Endeavor to avoid cutthroat competition, by consolidations, associations, brands, uniform accounting, 517. — Competition in foreign markets, 520. — Conclusions, 521.