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Forecast accuracy of Australian subnational population projections.

The authors assess demographic projections made over the last 20 years for Australia. "This paper first considers the role of accuracy amongst other objectives of projection activity. Accepting accuracy as a legitimate goal, we then assess the performance of 48 sets of population projections and forecasts for states and territories of Australia prepared since 1970. Projection accuracy is assessed by reference to length of forecast horizon, population size and rate of growth. We also examine the main sources of forecast error in selected projections for each state and compare the performance of past projections with alternatives based on simple extrapolation of contemporary population trends."

Australia↗

Projecting Australia's aged population: problems and implications.

Issues concerning the projection of Australia's population aged 60 years and over are examined. "The aims of this paper are to examine the extent to which projections made during the 1970s underestimated the growth of the aged population and, more particularly, to establish precisely what the demographic components of that under-projection were. Some of the implications of this analysis for planning provision of services for the aged are then explored."

Adult↗

Population forecasts for South Pacific nations using autoregressive models, 1985-2000.

"This paper uses an autoregressive statistical model to forecast population for Fiji, Western Samoa, Tonga, Solomon Islands, and Vanuatu and compares these forecasts with those obtained from other methods. The growth rate of population is predicted to continue to fall in Fiji and Tonga, rise a little for Western Samoa, and rise considerably in Vanuatu and the Solomon Islands. The implications of the forecasts for recent government development plans are also discussed."

Demography↗

Aboriginal population prospects.

The authors examine data from the 1986 and 1991 Australian censuses to assess discrepancies between the census data and past projections of the size and structure of the Aboriginal population. They also "comment on ways in which determinants of Aboriginal population change are diverging from the parameters used for previous projections. We pay particular attention to mortality prospects.... We note the evidence for under-enumeration of the Aboriginal population in particular age groups in the 1991 Census as in previous censuses, and estimate the size of adjustments necessary to correct for some, but not all, of these deficiencies. The analysis shows that Aboriginal fertility increased in the second half of the 1980s."

Age Distribution↗

Progress in demographic methodology.

"This paper examines developments in demographic methodology during the past decade or so. It focuses on methodological advances in the analysis of mortality of infants and young children, of adults, and on problems of mortality estimation in small populations. The other major areas reviewed here are related to the study of birth intervals, parity progression, proximate determinants of fertility, and the demography of the family. Concluding remarks relate the methodological issues to the information explosion in demography."

Adult↗

Population problems in Austronesia.

The author examines population issues facing countries in Oceania and Southeastern Asia. "Analysis is based on recently released population projections from the United Nations Population Division. There are great differences among the countries.... There are nonetheless important areas of commonality: all nations are facing the problem of raising levels of schooling in line with parents' aspirations and economic needs, all face problems of caring for a rising proportion of aged, and all have difficulties with the monitoring and control of international migration. Also, since minority groups in many countries are majority polities in neighbouring states, there is potential for establishing international dialogues aimed at relieving internal tensions." Consideration is given to the role of Australia in promoting international cooperation to deal with these issues.

Asia↗

Pitfalls in comparing immigrants with the Australian-born population with particular reference to socioeconomic status.

"With the increasing interest in the impact of immigration on the character of...Australia's population it is useful to draw attention to the differences that can occur when comparisons of the immigrant and the host population with respect to socioeconomic status are based on aggregate rather than on disaggregate measures. In this paper the discussion focuses on the implications of not disaggregating by age and sex, with respect to such variables as: post-school qualifications, occupation, and labour-force participation, using the total overseas-born population in Australia as an example. The analysis demonstrates the fact that the different age structures of the immigrant and the host populations can result in deficiencies in the aggregate rates."

Age Distribution↗

The demographic effects of immigration.

"This paper seeks to contribute to an understanding of the demographic consequences of immigration. The impact of immigration on population growth, population composition--by birthplace, age, sex, and marital status, and population distribution are briefly analysed. It is shown that the composition as well as the size of the intake is important. Five series of projections are presented to demonstrate the sensitivites of demographic trends to immigration policy changes." The data are for Australia for the period from the 1940s through the mid-1980s.

Age Factors↗

Rural-to-urban migration and the shadow wage in LDCs.

"This paper discusses the amount of rural-to-urban migration which will be forthcoming when a new urban job is created for which an institutionally fixed wage above the market-clearing level is offered. A simple formula is proposed to estimate migration response. It can be used to calculate the shadow wage in cost-benefit analysis (CBA) in less developed countries (LDCs)."

Cost-Benefit Analysis↗

Estimation of parity progression ratios from the truncated distribution of closed and open birth intervals.

A procedure to estimate parity progression ratios in a population from the truncated distribution of open and closed birth intervals is presented. The approach is quite simple in computation and data needs. It does not require any separate data on age at last birth to the women of completed fertility as in earlier methods. The procedure is illustrated with an observed set of data.

Biometry↗

Forecasting the extent of the HIV/AIDS epidemic.

This paper has a dual objective: (1) to describe the current status of the structure of a newly developed model system to generate a wide span of U.S. HIV/AIDS estimates; and (2) to implement that system through the development of a dataset of HIV/AIDS incidence and prevalence, by stage, in the U.S. for a range of past and future years. There are many uncertainties regarding the anticipated effects of HIV/AIDS; examination of many of these effects indicates multiple societal difficulties. The characteristic of AIDS-growth is that of a long-delayed but inexorable disabling morbidity "taking off" in 1991-1992 from an HIV population widely thought to be 1.0-1.5 million spread throughout the Nation. Although widely dispersed, its impact, even at this early stage of growth, is to endanger the health and social support systems of our urban centers. The spread of AIDS cases into the smaller cities and rural counties indicates that those problems will not be limited to our major cities. This paper provides new and purposely pessimistic estimates of the levels of prevalence and incidence of HIV/AIDS for future years, based on U.S. AIDS cases reported. Although these numbers are essentially upper bounds, their values are consistent with the upper sides of some recent broad band projections released in early Summer 1989 by the U.S. Government Accounting Office (GAO). However, our estimation has generated data within a more proscribed range. A first set of forecasts has been provided to the State of Virginia's Department of Health for their use in statewide resource planning. The United States and the world face a severe HIV pandemic in the coming decade. The certainty of the threat is acknowledged by all of the major private and public medical authorities and institutions. Yet, to date, no official projection of the emergence, the level, and the sweep of the epidemic has been accepted by the medical community. And, there is certainly little agreement on the impact on the delivery of health care services in the United States and Canada, as well as throughout the world. On 26 June 1989, the U.S. GAO released a report that concluded, in part, that the Federal government's official data [e.g. from the Centers for Disease Control's (CDC) Morbidity and Mortality Weekly Report (MMWR) of 12 May 1989] were greatly understating the epidemic's extent. Specifically, the CDC's estimate of 185,000-320,000 (cumulative) cases of AIDS expected to be reported by the end of 1991 contrasted with GAO's estimate of 300,000-480,000.(ABSTRACT TRUNCATED AT 400 WORDS)

Acquired Immunodeficiency Syndrome↗

Human population dynamics revisited with the logistic model: how much can be modeled and predicted?

"We revive the logistic model, which was tested and found wanting in early-20th-century studies of aggregate human populations, and apply it instead to life expectancy (death) and fertility (birth)....For death...the logistic portrays the situation crisply. Human life expectancy is reaching the culmination of a two-hundred year-process that forestalls death until about 80 for men and the mid 80s for women. No breakthroughs in longevity are in sight unless genetic engineering comes to help. For birth, the logistic covers quantitatively its actual morphology. However, because we have not been able to model this essential parameter in a predictive way over long periods, we cannot say whether the future of human population is runaway growth or slow implosion... From a niche point of view, resources are the limits to numbers, and access to resources depends on technologies. The logistic makes clear that for homo faber, the limits to numbers keep shifting. These moving edges may most confound forecasting the long-run size of humanity."

Conservation of Natural Resources↗