THE NUMBER‐AVERAGE SIZE RULE: A NEW EMPIRICAL RELATIONSHIP BETWEEN INDUSTRIAL LOCATION AND CITY SIZE*

ABSTRACT The spatial intensities of both industries and population are highly uneven across space. Moreover, these intensities differ not only across industries, but also change through time. Nevertheless, we show using Japanese data for metropolitan areas in two time periods that the location intensities of both industries and population are linked by surprisingly simple and persistent patterns. In particular, we identify a strong negative log‐linear relation between the number and the average (population) size of metro areas in which a given industry is found. This relation, which we designate as the Number‐Average Size (NAS) Rule, is also shown to be intimately connected to both the Rank‐Size Rule and Christaller's (1966) Hierarchy Principle applied to metropolitan areas. In particular, we show mathematically that in the presence of the Hierarchy Principle (which holds quite well in Japan) this NAS Rule is essentially equivalent to the Rank Size Rule.     

Severe lead contamination among children of samurai families in Edo period Japan

This paper presents evidence for severe lead contamination among children of samurai families living in a castle town in Edo period Japan (1603–1867). Excavated rib bones were analyzed by atomic absorption, and soft X-ray roentgenograms of long bones were taken. The median values of lead concentration in the bones of children 3 years of age and under(1241.0 μg Pb/g dry bone) and 4–6 years of age (462.5 μg Pb/g dry bone) were significantly higher than those of adult males (14.3 μg Pb/g dry bone) and females (23.6 μg Pb/g dry bone) (p < 0.001). In addition, that of children over 6 years of age (313.0 μg Pb/g dry bone) was significantly higher than those of adult males (p < 0.01) and adult females (p < 0.05). The median value of lead in the bones of children 3 years of age and under was over fifty times higher than that of their mothers (adult females). Hypertrophy was seen in the long bones of five samurai children. In this area, lead lines or lead bands were distinguished by soft X-ray roentgenogram. Samurai children suffered from severe lead contamination in Edo period Japan. When the mothers were nursing their children, the children might have ingested their mother’s white lead non-selectively.     

Spinal degenerative lesions and spinal ligamentous ossifications in ancient Chinese populations of the Yellow River Civilization

Rheumatological diseases, whether inflammatory or degenerative, are ubiquitous among modern Asian people but very few palaeopathological studies have been performed in Asia on this subject. Since 1996, we have been carrying out a palaeoepidemiological survey of rheumatic diseases in ancient Chinese and Japanese skeletal populations. Findings on the spinal column in ancient Chinese populations (ca. 5000 bc –ad 1644) in Henan Province (centre of the Yellow River Civilization) are reported in this study. The examined number of the people over 20 years old was 365 (185 males, 169 females and 11 unsexed). Of these, 248 were young adults, 98 were middle adults and 19 were old adults. Crude prevalence (number/100) in total population of vertebral osteophytosis/facet osteoarthritis was 17.5/7.7, 17/3.7 and 44.6/21.1 at the cervical, thoracic and lumbar spine, respectively. That of ossified anterior longitudinal ligament (OALL) or Forestier's disease was around 3 at each of the cervical, thoracic and lumbar spine. Ossification of the posterior longitudinal ligament (OPLL) of the cervical spine was observed in five out of 114 skeletons with cervical spine preserved, while it did not exist in any thoracic and lumbar segment. Ossification of the ligamentum flavum (OLF) was predominantly observed in the thoracic spine, the crude prevalence of which was 36.7. Overall spinal degenerative lesions seemed to have been more prevalent and spinal ligament ossifications less prevalent in ancient Chinese populations than in modern people. None of the inflammatory lesions like rheumatoid spondylitis, as well as seronegative spondyloarthropathies, were detected. This is the first palaeopathological study in which the prevalence of OPLL and OLF, the two clinically important spinal ligamentous ossifications causing myelopathy in modern mankind, was surveyed in ancient skeletons. Copyright © 2000 John Wiley & Sons, Ltd.     

Inequalities,responsibility and rational capacities: A defence of responsibility-sensitive egalitarianism

This article aims to defend responsibility-sensitive egalitarianism by arguing for the rational capacities-based principle of responsibility as a plausible conception of an agent's responsibility for inequalities caused by his or her choice in responsibility-sensitive egalitarianism. I show that the rational capacities-based principle of responsibility is not only philosophically defensible as a conception of genuine choice, but also promising enough to ward off two common worries which cast doubt on responsibility-sensitive egalitarianism (qua luck egalitarianism): first, the rational capacities-based principle of responsibility allows the assignment of differential degrees of responsibility to rational agents in proportional terms, which may make it echo the adverse effects of their childhood environments. Second, its proportional construal essentially allows that nobody possesses a full degree of rational capacities. This enables responsibility-sensitive egalitarianism to refute the harshness objection.     

Earliest evidence of spinal tuberculosis from the Aneolithic Yayoi period in Japan

Tuberculosis has existed from early prehistoric days to modern times. The main causative agents of tuberculosis worldwide are Mycobacterium tuberculosis (M. tuberculosis) and M. bovis, along with M. africanum, M. cenettii and M. microti; these species make up the ‘M. tuberculosis complex’. This worldwide infection has been of special interest to palaeopathologists due to its characteristic bone lesions as well as its great antiquity. Historically, tuberculosis has been recognised in Japan for more than a thousand years. However, the origin and early prevalence of tuberculosis remain unknown. In the present study, we present the earliest evidence of skeletal tuberculosis found in the Aneolithic Yayoi period in Japan (ca. 300 BC to AD 300). The skeletal remains showing typical pathological changes of spinal tuberculosis were dated to between 454 BC and AD 124 by dendrochronological methods using coburied arrow-shield board and house columns made of Japanese cedar. We discuss the early prevalence of this infectious disease and its influence on the population history of the Japanese from prehistoric to Aneolithic times. Copyright © 2006 John Wiley & Sons, Ltd.     

Nodes and edges: A network approach to hierarchisation and state formation in Japan

This paper argues that the centralised hierarchy that emerged at the beginning of the Kofun (mounded tomb) period in Japan can be explained by the locations that the polities to be hierarchised occupy and the differences in the topological potentials that these locations generate. Previous attempts of explaining the phenomenon by attributing its cause to factors such as differential access to resources and control over their distribution have been proven not to fit with the available body of evidence. The application of social network analysis-derived concepts and methods reveals that the topological locations that polities occupied generated different centralities, i.e. different degrees of connectedness to other polities and of mediating interactions between polities, which led to the hierarchisation and centralisation of their relationships. The paper concludes that the topological structure of a social network itself can be a significant cause of its own hierarchisation, and it compares the finding with the manner in which the concepts of agency and power are applied to the explanation of social hierarchisation and centralisation.     

A possible case of spondyloarthropathy in a prehistoric Japanese skeleton

Palaeopathology helps to define the migration of past diseases. Genetic and environmental factors play a role in the development of spondyloarthropathy (SpA). We report skeletal remains with SpA from the Jomon period in Japan. The skeleton is of a female who died at a young adult age. The skeleton had characteristic features seen in SpA as follows: (1) polyarticular arthritis; (2) erosions accompanying some bone formation; (3) enthesial ossification; and (4) periostitis in lower long bones. The findings suggest that SpA was present in prehistoric Japan before contact with European civilisation, and the present example of SpA is the oldest in Asia and the Old World. Copyright © 2004 John Wiley & Sons, Ltd.     

Optimal Environmental policies for Sustainable Growth: A Two-Region Model

I examine the sustainability of a spatial economy consisting of an advanced region and a developing region. The advanced region aids the developing region with technological knowledge on pollution abatement. The model is based mainly on that of van den Bergh and Nijkamp (1995) but differs in that the aids are determined through an optimal control method. The numerical simulation shows that the optimal control policy is thought to be effective in the sense that almost all trajectories of the welfare index of the advanced region are single-peaked with a fairly long duration of growth, and the policy favorably affects the welfare level of the developing region.     

Erosive peripheral polyarthritis in ancient Japanese skeletons: A possible case of rheumatoid arthritis

The antiquity of rheumatoid arthritis (RA) is still in dispute, due to the difficulty of conclusively differentiating peripheral polyarthritis, especially from spondyloarthropathy, in archaeological populations. In view of the importance of genetic factors in developing spondyloarthropathy and of the far lower prevalence of the disease in modern Japanese, a rarity of peripheral polyarthritis would be anticipated in the ancient Japanese population, given that RA had not been present there. One hundred and sixty adult Japanese skeletons of the late and final Jomon period (3400–2400 years bp ) were examined to find peripheral polyarthritis. There was one male skeleton with peripheral polyarthritis, showing marginal and surface erosions in the joints of the hands, feet, ankle and zygoapopheseal joints of the thoracic vertebrae. RA is suggested as the most probable cause of this pathology. This report raises the significance of further studies to consider whether more cases than anticipated exist in skeletal populations that would have been resistant to developing spondyloarthropathy. Copyright © 1999 John Wiley & Sons, Ltd.