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        Krugman and Young Revisited: A Survey of the Sources of Productivity Growth in a World with Less Constraints

        Robin C. Sickles,Burcu Cigerli 서울대학교 경제연구소 2009 Seoul journal of economics Vol.22 No.1

        Young (1994) and Kim and Lau (1994), among others, argue that the "Asian Miracle" of relatively high growth was largely due to increases in factor inputs. Productivity growth would eventually slow because of diminishing returns to factors. Thus total factor productivity growth was not the reason for the Asian Miracle. Krugman (1994) summarized this research, comparing the growth experience of Singapore, among the other Asian Tigers, to that of the Soviet Union and argued that there was reason to expect a similar outcome, namely a collapse of the political institutions due to economic stagnation. Interestingly, Krugman consistently refers to efficiency growth and technical progress as equivalent terms. In this paper and survey we discuss alternative explanations for economic growth in Asia as well as elsewhere in the world in the post WWII years. The alternative explanation is explicit in Krugman's treatise. It is economic growth due to a world with less constraints.

      • Three-dimensional assessment of the temporomandibular joint and mandibular dimensions after early correction of the maxillary arch form in patients with Class II division 1 or division 2 malocclusion

        Hande Gorucu Coskuner,Semra Ciger 대한치과교정학회 2015 대한치과교정학회지 Vol.45 No.3

        Objective: This study aimed to assess three-dimensional changes in the temporomandibular joint positions and mandibular dimensions after correction of dental factors restricting mandibular growth in patients with Class II division 1 or division 2 malocclusion in the pubertal growth period. Methods: This prospective clinical study included 14 patients each with Class II division 1 (group I) and Class II division 2 (group II) malocclusions. The quad-helix was used for maxillary expansion, while utility arches were used for intrusion (group I) or protrusion and intrusion (group II) of the maxillary incisors. After approximately 2 months of treatment, an adequate maxillary arch width and acceptable maxillary incisor inclination were obtained. The patients were followed for an average of 6 months. Intraoral and extraoral photographs, plaster models, and cone-beam computed tomography (CBCT) images were obtained before and after treatment. Lateral cephalometric and temporomandibular joint measurements were made from the CBCT images. Results: The mandibular dimensions increased in both groups, although mandibular positional changes were also found in group II. There were no differences in the condylar position within the mandibular fossa or the condylar dimensions. The mandibular fossa depth and condylar positions were symmetrical at treatment initiation and completion. Conclusions: Class II malocclusion can be partially corrected by achieving an ideal maxillary arch form, particularly in patients with Class II division 2 malocclusion. Restrictions of the mandible in the transverse or sagittal plane do not affect the temporomandibular joint positions in these patients because of the high adaptability of this joint.

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