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In: United Nations. Department of International Economic and Social Affairs. Population projections: methodology of the United Nations. Papers of the United Nations Ad Hoc Expert Group on Demographic Projections, United Nations Headquarters, 16-19 November 1981. New York, United Nations, 1984. 4-6. (Population Studies No. 83 ST/ESA/SER.A/83)These recommendations refer specifically to the work of the Population Division of the UN and the regional commissions and more generally to the work of the specialized agenices, which prepare projections of labor force and school enroolment. The current recommendations may be regarded as updating an earlier detailed set that was issued by a similar group of experts who convened in New York in November 1977. The recommendations cover general considerations, sources and assumptions, evaluation of projections and their uses, and internal migration and urbanization. The Population Division should consider the question of an optimal time schedule for publishing new estimates and projections in order to avoid unduly long intervals between publications and intervals so short as to cause confusion. The UN Secretariat has an important role in pursuing work on methodology of projections and making it available to demographers in the developing countries. Unique problems of demographic projection exist for those countries with particularly small populations. It is proposed that the Population Division prepare special tabulations, whenever possible, giving the estimated age and sex distribution for these countries. Future publications of population projections prepared by the Population Division should indicate the major data sources on which the projections are based and note if the data were adjusted before inclusion. In addition, some grading of the quality of the base data should be presented. For the UN set of national and international population projections, a more comprehensive system of establishing assumptions about the future trends of fertility is needed. The Secretariat needs to focus more attention on the evaluation of its population projections. UN publications of projections should report on the main errors in recent past projections with respect to estimates of baseline levels and trends and provide some evaluation of the quality of the current estimates. It is recommended that the UN encourage countries to establish a standard definition of urban which would be used for international comparisons but generally not replace current national definitions. The Secretariat should review the techniques currently used to project urban-rural and city populations and search for methodologies appropriate to the level of urbanization and the quality of data which would improve the accuracy of the projections. The Division should regularly produce long range population projections for the world and major countries and should continue and expand its household estimates and projection series, which provides information essential to government administrators and planning agencies, businesses, and researchers in all countries.
POPULI. 1986; 13(1):15-25.Over half of the 75 world cities projected to have populations exceeding 4 million by the year 2000 are in Asia. Asia's planners and city officials have developed and tested numerous policies and istruments for coping with rapid urban growth. These efforts have benefited from increased understanding of the demographic causes of urbanization, especially rural-urban migration. On an aggregate plane, the main consequences of urbanization have been metropolitanization, primacy, polarization, and centralization. Economic wealth, political power, and social status have become concentrated in capital cities; within cities, the increasing gap between privileged elites and impoverished masses has contributed to political radicalization among the poor. To cope with the problems of urbanization, many Asian authorities have set up metropolitan governments to handle area wide functions. Some cities have redefined their jurisdictions to incorporate outlying rural territories and small towns. The expansion of metropolitan jurisdiction prevents local government fragmentation and duplication of public services. It also allows for land-use controls over undeveloped areas that will be needed for urban expansion. In recent years, natural increase has been a more important factor in rapid urban growth than migration; thus, many Asian countries have adopted family planning programs to curb population growth. Most of the factors associated with declining fertility--educational achievement, employment of women, access to family planning services--are closely associated with urban culture, and urban fertility rates tend to be lower than those in rural areas. To be valid, urban policy goals must be integrated into broader development goals. Population issues permeate all stages of the planning process and should be viewed both as a cause and a consequence of economic and social development.
POPULI. 1986; 13(1):5-14.Within the next 50 years, the predominantly rural character of developing countries will shift as a result of rapid world urbanization. In 1970 the total urban population of the more developed world regions was almost 30 million more than in the less developed regions; however, by the year 2000 the urban population of developing countries will be close to double that in developed countries. A growing proportion of the urban population will be concentrated in the biggest cities. At the same time, the rural population in developing countries is expected to increase as well, making it difficult to reduce the flow of migrants to urban centers. Although urban fertility in developing countries tends to be lower than rural fertility, it is still at least twice as high as in developed countries. The benefits of urbanization tend to be distributed unevenly on the basis of social class, resulting in a pattern of skewed income and standard of living. Social conditions in squatter settlments and urban slums are a threat to physical and mental health, and the educational system has not been able to keep up with the growth of the school-aged population in urban areas. The problems posed by urbanization should be viewed as challenges to social structures and scientific technologies to adapt with concern for human values. It is suggested than 4 premises about the urbanization process should guide urban planners: 1) urban life is essential to the social nature of the modern world; 2) urban and rural populations should not be conceptualized in terms of diametrically opposed interest groups; 3) national policies will have an impact on urban areas, just as developments in the cities will impact on national development; and 4) the great cities of the world interact with each other, exchanging both trade and populations. The United Nations Family Planning Association stresses the need for 3 fundamental objectives: economic efficiency, social equity, and population balance.
Editorial Research Reports. 1985; 2(20):887-904.The author discusses aspects of urbanization, living conditions in urban centers, and selected policies, summarizing findings from recently published sources. U.N. population projections for selected urban areas for the year 2000 are compared with 1950 estimates, and the proportions of the population living in urban areas in various regions of the world are contrasted. Attention is given to living conditions in rapidly growing and crowded cities, including Mexico City, Mexico; Sao Paulo and Rio de Janeiro, Brazil; Lagos, Nigeria; and Cairo, Egypt. Statements on urban growth issued by the U.N. Fund for Population Activities are considered.
In: United Nations. Department of International Economic and Social Affairs. Population projections: methodology of the United Nations. Papers of the United Nations Ad Hoc Expert Group on Demographic Projections, United Nations Headquarters, 16-19 November 1981. New York, United Nations, 1984. 15-6. (Population Studies No. 83; ST/ESA/SER.A/83)As the UN demographic estimates and projections cover all the developed and developing countries, special problems are encountered in data collection and evaluations. The responsibility for the UN projections rests primarily with the Population Division, but the results are the product of collaboration by all responsible offices within the UN system. This is 1 of the strengths of the UN population projections, yet there are numerous problems concerning those projections. Aside from the perpetual difficulties with collection and estimation of basic demographic indicators from incomplete data, all of which must be continuously undertaken, there are 8 major problems which have become more important in recent years and concern the current UN demographic projections. The 1st problem is the question of meeting the needs of the users who are the researchers, the planners, and the policymakers. The 2nd problem is that significant improvement can be made in the methodologies with, on the 1 hand, the prodigious advances in calculation devices and research techniques and on the other, a better knowledge of the economic and social context of demographic variables. The 3rd major problem in the component method of projections of fertility, which continues to be the most influential component to the future population of most nations. Another component of projection, mortality, has become a pressing issue in the field of projection as well. Knowledge of mortality in the third world is highly fragmentary. The 5th problematic issue is urbanization and city growth. There are severe problems with data comparability and projection methods. Sixth, for several developing and developed countries international migration plays a significant role in their population growth. More problematic than estimating the current net numbers of migrants is formulating assumptions about future patterns of international migration. Seventh, thus far demographic projections have largely been based on the demographic theory of transition, which appears to continue to be useful for developing countries. Yet, the demographic transition models are affected by a wider variety of trajectories than anticipated. Finally, no one has been able to explain clearly the major simultaneous movements of fertility of the developed countries. The question of obvious policy significance is what will happen in the future.