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Public timber supply, market adjustments, and local economies: economic assumptions of the Northwest Forest Plan.

The Northwest Forest Plan in the Pacific Northwest sought to stabilize local economies, including local employment and income, by stabilizing the flow of wood fiber from public forests. This is also a common forest management objective in other regions and countries. Because this economic strategy ignores basic market adjustments, it is likely to fail and to unnecessarily damage forest ecosystems. Application of basic economic principles on how markets operate significantly changes the apparent efficacy of efforts to manage local economies by managing timber supply. The emphasis on timber supply tends to ignore the dominant role that the demand for wood fiber and wood products, rather than wood-fiber supply, plays in determining levels of harvest and production. Contemporary economics indicates that markets tend to operate to offset reductions in wood-fiber supply. This significantly moderates the economic cost of reducing commercial timber harvest in the pursuit of environmental objectives. In addition, contemporary economic analysis indicates that the economic links between natural forests and local communities are much broader than simply the flow of commercially valuable logs to manufacturing facilities. At least in the United States, the flow of environmental services from natural forests has increasingly become an amenity that has drawn people and economic activity to forested areas. Attractive site-specific qualities, including those supported by natural forests, can potentially support local economic development even in the face of reduced timber harvests. These market-related adjustments partially explain the Northwest Forest Plan's overestimation of the expected regional impacts associated with reduced federal timber supply and the ineffectiveness of the plan's efforts to protect communities by stabilizing federal timber supply

Conservation of Natural Resources↗

The role of society in engineering risk analysis: a capabilities-based approach.

This article proposes a new conceptual framework in engineering risk analysis to account for the net impact of hazards on individuals in a society. It analyzes four limitations of prevailing approaches to risk analysis and suggests a way to overcome them. These limitations are a result of how societal impacts are characteristically accounted for and valued. Prevailing approaches typically focus too narrowly on the consequences of natural or man-made hazards, not accounting for the broader societal impacts of such hazards. Such approaches lack a uniform and consistent metric for accounting for the impact of the nonquantifiable consequences (like psychological trauma or societal impacts) and rely upon implicit and potentially inaccurate value judgments when evaluating risks. To overcome these limitations, we propose an alternative, Capabilities-Based Approach to the treatment of society in risk analysis. A similar approach is currently used by the United Nations to quantitatively measure the degree of development in countries around the world. In a Capabilities-Based Approach, the potential benefits and losses due to a hazard are measured and compared in a uniform way by using individual capabilities (functionings individuals are able, still able, or unable to achieve) as a metric. This Capabilities-Based Approach provides a foundation for identifying and quantifying the broader, complex societal consequences of hazards and is based on explicit, value judgments. The Capabilities-Based Approach can accommodate different methods or techniques for risk determination and for risk evaluation and can be used in assessing risk in diverse types of hazards (natural or man-made) and different magnitudes that range from minor to catastrophic. In addition, implementing a Capabilities-Based Approach contributes to the development of a single standard for public policy decision making, since a Capabilities-Based Approach is already in use in development economics and policy.

Journal Article↗

Early child health in Lahore, Pakistan: IX. Perinatal events.

In Pakistan there are a number of acute problems related to maternal and infant health in the perinatal period. There is also lack of reliable data needed for the formulation of action strategies. To provide a database 1490 women have been followed from the 5th month of pregnancy in four different areas at various levels of urbanization and socio-economic development. After adjusting for gestational age, the proportion of newborns with weight for length < -2SDS in relation to the Swedish National Standard was 12-31% for boys and 12-25% for girls, the figure being highest in the most deprived area. Preterm birth was infrequent compared with IUGR. The overall prevalence rate of birth defects was 21% out of which 8% were severe defects. The overall perinatal mortality rate was 56/1000 births, with rates of 60, 75, 36 and 33/1000 births for the village, periurban slum, urban slum and the upper middle class. Two thirds of the deaths were related to either a continuation of intrauterine disturbances or severe congenital defects incompatible with life. One third of the deaths were due to infection; mostly diarrhoea, clinical sepsis and ARI. Neonatal mortality was significantly related to birth length (< -2SDS, odds ratio 5.5) and length of gestation (< 37 weeks, odds ratio 5.6) and was to a lesser extent related to weight (< -2SDS, odds ratio 2.0) and weight for length (< -2SDS, odds ratio 1.3). Forty percent of the mothers had weight for height below -2SDS, 23-35% had height < -2SDS. Forty percent of mothers from a subset within the cohort had a hemoglobin < 10 gm/dl and 20% showed signs of pre-eclampsia. This presentation raises the issue of expanding the current Child Survival Programs into the perinatal period as well.

Adolescent↗

Born small for gestational age: consequences for growth.

A large number of studies have documented a strong correlation between size at birth and subsequent height, although the reported incidence of catch-up growth and consequently the impact on final height has varied with time and between countries. These variations may be real, but could also be related to a number of methodological problems. The aim of this study was to explore two important aspects related to postnatal growth after disturbed fetal growth: first, the definition of small for gestational age (SGA), including the selection of cut-off points in defining shortness; and, secondly, the importance of the general socio-economic status of the population with regard to the incidence of growth faltering in early life. Data were analysed from two longitudinal population-based studies, one from Sweden and one from Hong Kong. Of the Swedish cohort, 3.8% had a birth length below -2 SD scores; in the Hong Kong population the corresponding value was 11.9% (Swedish reference values were used in both studies). The following conclusions were made. Size at birth is important for postnatal growth, and the difference in length at birth of 9-10 cm between the two extreme birth length subgroups remains, on average, until maturity. This seems to be true for the two study populations with different degrees of socio-economic development. However, the rate of catch-up growth is highly dependent on the definition of SGA, on the rate of catch-up growth in early life and on the incidence of growth faltering between 6 and 18 months of age.

Adolescent↗

The water crisis in the gaza strip: prospects for resolution.

Israel and the Palestinian Authority share the southern Mediterranean coastal aquifer. Long-term overexploitation in the Gaza Strip has resulted in a decreasing water table, accompanied by the degradation of its water quality. Due to high levels of salinity and nitrate and boron pollution, most of the ground water is inadequate for both domestic and agricultural consumption. The rapid rate of population growth in the Gaza Strip and dependence upon ground water as a single water source present a serious challenge for future political stability and economic development. Here, we integrate the results of geochemical studies and numerical modeling to postulate different management scenarios for joint management between Israel and the Palestinian Authority. The chemical and isotopic data show that most of the salinity phenomena in the Gaza Strip are derived from the natural flow of saline ground water from Israel toward the Gaza Strip. As a result, the southern coastal aquifer does not resemble a classic "upstream-downstream" dispute because Israel's pumping of the saline ground water reduces the salinization rates of ground water in the Gaza Strip. Simulation of different pumping scenarios using a monolayer, hydrodynamic, two-dimensional model (MARTHE) confirms the hypothesis that increasing pumping along the Gaza Strip border combined with a moderate reduction of pumping within the Gaza Strip would improve ground water quality within the Gaza Strip. We find that pumping the saline ground water for a source of reverse-osmosis desalination and then supplying the desalinated water to the Gaza Strip should be an essential component of a future joint management strategy between Israel and the Palestinian Authority.

Conservation of Natural Resources↗

Disparities in access to care among rural working-age adults.

CONTEXT: Nationally, minority population disparities in health and in the receipt of health services are well documented but are infrequently examined within rural populations. PURPOSE: The purpose of this study is to provide a national picture of health insurance coverage and access to care among rural minorities. METHODS: A cross-sectional analysis using the 1999-2000 National Health Interview Surveys examined insurance status and receipt of ambulatory care during the past year. Multiple logistic regression was used to measure factors influencing the odds of insurance coverage and a provider visit. FINDINGS: Among rural minority adults, 32% of blacks, 35% of "other" race persons, and 45% of Hispanics were uninsured compared to 18% of whites. Differences in insurance status were not significant for rural blacks and Hispanics after resources such as education, income, and employment were held constant. Examining use, 37% of rural Hispanics and 27% of blacks, versus 20% of whites and 19% of persons of other race, had not made a health care visit in the past year. When resources were held constant, blacks and persons of other race/ethnicity no longer differed from whites, but differences among Hispanics persisted. CONCLUSIONS: A comprehensive approach to the health needs of rural working age adults must consider the unique characteristics of rural communities and populations, requiring cultural as well as financial creativity in the design of health delivery systems. The importance of resources such as education and employment points to the need to link health problems to area-specific rural economic development.

Adolescent↗

Changes of plasma lipids and biochemical markers for coronary artery disease in Korea.

The average Korean diet is low in total fat, cholesterol, animal protein, and sugar, and high in total carbohydrate, and adequate in total protein. More foods are derived from vegetables than in any comparable Western countries. The nutritional status of Korean is good without evidence of any gross nutritional deficiency. The leading causes of death, currently, form a unique ranking of malignancies, accidents, and cerebrovascular diseases. Korean diet may account for the strikingly low incidence of heart disease. Studying the relationship between diet and these diseases may greatly aid our understanding of their pathogenesis and lead to improved prevention and treatment. Current changes in the Korean diet are a decreasing proportion of carbohydrates with increasing proportions of fat and animal protein and an increased content of cholesterol. The ratio of polyunsaturated to saturated fatty acid of Korean diet seems to fall in desirable range. The changes in plasma cholesterol levels and CAD mortality among Korean in the past 20 years seem to be a reflection of changes in diet. Similar changes could be seen in the Japanese population. In Korea, the incidence of CAD is still low compared with that in western countries. Recently, a slightly increased incidence of CAD has been observed in Korea. Thus, establishment of reliable biochemical markers and their cut-off values are needed for the Korean population. Several methods including TC, TG, HDL-C, LDL-C, HDL-C/TC, LDL-C/TC, LDL-C/HDL-C, Apo A-I, Apo B and Apo A-I/B for CAD were examined and found that Apo A-I/B ratio was a good biochemical marker for CAD in Korea. In the future, the Korean diet will probably continue to change. The changes are being influenced by economic development that have been emerging and growing stronger since 1980 and that will probably continue to be potent. The effect of these changes upon CAD is not clear at the present time. To detect a changing incidence of CAD and to evaluate the significance of diet will require continued close observation and use of more specific and sensitive methods. The Korean experience with diet and plasma lipids will be potentially valuable in appraising CAD of both developing and technically developed countries.

Adult↗

The nutrition transition: new trends in the global diet.

Analyses of economic and food availability data for 1962-1994 reveal a major shift in the structure of the global diet marked by an uncoupling of the classic relationship between incomes and fat intakes. Global availability of cheap vegetable oils and fats has resulted in greatly increased fat consumption among low-income nations. Consequently, the nutrition transition now occurs at lower levels of the gross national product than previously, and is accelerated further by high urbanization rates. Data from Asian nations, where diet structure is rapidly changing, suggest that diets higher in fats and sweeteners are also more diverse and more varied. Given that preferences for palatable diets are a universal human trait, fat consumption may be governed not by physiological mechanisms but by the amount of fat available in the food supply. Whereas economic development has led to improved food security and better health, adverse health effects of the nutrition transition include growing rates of childhood obesity. The implications of these trends are explored.

Diet↗

An immunogenic Onchocerca volvulus antigen: a specific and early marker of infection.

Onchocerciasis (river blindness) is a serious health problem and a severe obstacle to social and economic development, especially in Africa. A complementary DNA fragment coding for an Onchocerca volvulus antigen (OV-16) was cloned and expressed in the plasmid vector pCG808fx. Immune responses to this O. volvulus-specific recombinant antigen were detectable in patients with documented onchocerciasis; the antibody response was also detectable at 3 months and at more than 1 year before infection could otherwise be detected in humans and in chimpanzees experimentally infected with O. volvulus third-stage larvae.

Animals↗

Food science and nutrition: the gulf between rich and poor.

The people of economically developed countries benefit greatly from modern food science. They are protected from food contamination, have access to a great variety of food, and need spend little time preparing it. The poor in developing countries enjoy few of the benefits of food science. Their diets are often nutritionally deficient and they spend many hours each day processing their food and searching for wood with which to cook it. In most tropical countries food losses between harvest of slaughter and eventual consumption are inestimable. Efforts to improve post-harvest food systems in developing countries require the attention and ingenuity of many scientific disciplines and the support of all development agencies.

Cooking↗

Weaning of infants.

The WHO 2001 global recommendation is a one size fits all approach to weaning, an approach which may not take sufficient account of the special needs of some infants and fails to allow for the different problems encountered in the industrialised nations compared with economically developing countries. For the healthy normal birth weight full term infant born in an industrialised country, current research supports the benefit of exclusive breast milk feeding until 4-6 months. Evidence of harm through introducing solid food to these infants earlier than this is weak. Infants should be managed individually according to their needs.

Age Factors↗

Response to inhaled histamine and 24 hour sodium excretion.

A relation between the prevalence of asthma and economic development has been suggested by studies in migrants and other surveys in developing countries. That this correlation might be partially explained by an increased intake of salt in the diet is supported by the observation that sales of table salt in the different regions of England and Wales are independently correlated with mortality from asthma for men and for children. As part of a wider survey of asthma 138 men living in two Hampshire villages and aged 18-64 were given a bronchial histamine challenge test and had their 24 hour urinary excretion of sodium measured. Bronchial reactivity was strongly related to 24 hour excretion of sodium after allowing for the effects of age, atopy, and cigarette smoking, there being on average a 10-fold difference in reactivity over the 95% range of sodium excretion recorded in the study. The data suggest that a high sodium diet may potentiate bronchial reactivity.

Adolescent↗

By how much does dietary salt reduction lower blood pressure? I--Analysis of observational data among populations.

OBJECTIVE: To estimate the quantitative relation between blood pressure and sodium intake. DESIGN: Data were analysed from published reports of blood pressure and sodium intake for 24 different communities (47 000 people) throughout the world. MAIN OUTCOME MEASURE: Difference in blood pressure for a 100 mmol/24 h difference in sodium intake. Allowance was made for differences in blood pressure between economically developed and undeveloped communities to minimise overestimation of the association through confounding with other determinants of blood pressure. RESULTS: Blood pressure was higher on average in the developed communities, but the association with sodium intake was similar in both types of community. A difference in sodium intake of 100 mmol/24 h was associated with an average difference in systolic blood pressure that ranged from 5 mm Hg at age 15-19 years to 10 mm Hg at age 60-69. The differences in diastolic blood pressure were about half as great. The standard deviation of blood pressure increased with sodium intake implying that the association of blood pressure with sodium intake in individuals was related to the initial blood pressure--the higher the blood pressure the greater the expected reduction in blood pressure for the same reduction in sodium intake. For example, at age 60-69 the estimated systolic blood pressure reduction in response to a 100 mmol/24 h reduction in sodium intake was on average 10 mm Hg but varied from 6 mm Hg for those on the fifth blood pressure centile to 15 mm Hg for those on the 95th centile. CONCLUSIONS: The association of blood pressure with sodium intake is substantially larger than is generally appreciated and increases with age and initial blood pressure.

Adolescent↗

Averting a world food shortage: tighten your belts for CAIRO II.

We are going to have to eat what the world will produce with all its failings, not what it could produce without them. Trends in global food production are therefore all important. These are now giving cause for anxiety, in that the rate of increase of global grain yields has been slowing seriously. Locally, the food security of some demographically trapped communities is so dire that, like China, they need one child families. The 1994 Cairo population conference (Cairo I) took future food supplies for granted and took no account of demographic entrapment: the conference should be recalled urgently as CAIRO II.

Edible Grain↗

Tar, nicotine, and carbon monoxide yields of some Nigerian cigarettes.

Fourteen cigarette brands manufactured in Nigeria in 1981 were analysed to determine the tar, nicotine, and carbon monoxide yields. Five of the brands belonged to the high and middle to high tar category (greater than 22 mg/cigarette) and nine to the middle tar (17-22 mg/cigarette) category. None of the cigarettes was in the low to middle and low tar (less than 17 mg/cigarette) category. The nicotine and carbon monoxide yields were similar to those of European cigarettes. Tobacco companies need to manufacture low tar cigarettes in the Third World as is the practice in the economically developed parts of the world.

Carbon Monoxide↗

Variation in the magnitude of black-white differences in stroke mortality by community occupational structure.

STUDY OBJECTIVE: The aim was to examine the patterns of black-white differences in stroke mortality across communities with varying levels of occupational structure in the southern region of the United States DESIGN: Annual age adjusted race-sex specific rates for stroke mortality were calculated for the years 1979-1981 and related to socioeconomic conditions. SETTING: The study involved 211 state economic areas comprising the southern region of the USA. STUDY POPULATION: Data on stroke mortality for black and white men and women between the ages of 35 and 74 years living in the study area were acquired from the National Center for Health Statistics. MEASUREMENTS AND MAIN RESULTS: Occupational structure was measured as the proportion of white collar workers in each state economic area, and is an indicator of the employment opportunities and related social and economic resources of a community. Stratified analyses and linear regression modelling indicate that communities of lower occupational structure have (a) higher levels of stroke mortality for all four race-sex groups (p less than 0.05) and (b) larger racial inequalities in stroke mortality (p less than 0.01). For men and women, the excess stroke mortality among blacks compared to whites is larger in communities of lower occupational structure. CONCLUSIONS: Consideration of occupational structure and related patterns of economic development is crucial for understanding the distribution of stroke mortality within and between racial groups, as well as for planning effective public health interventions. The larger racial inequalities in communities of lower occupational structure in the south suggest that aspects of the black experience which are conducive to high rates of stroke mortality are exacerbated in those communities. Public health interventions to reduce the racial and social inequalities in stroke mortality should recognise the social context within which nutritional, occupational, medical care, and environmental determinants of stroke are distributed.

Adult↗

Effect of a transient, geographically localised economic recovery on community health and income studied with longitudinal household cohort interview method.

STUDY OBJECTIVE: The main purpose of the study was to determine whether the health or economic status of a cohort of residents in an economically troubled geographical area changed between 1990 and 1993. DESIGN: Longitudinal, single cohort, interview survey method with the key variables of health status and economic status. Quasi-experimental pre-post design with economic rebound as the intervention. SETTING: A relatively low income geographical area in a rural, mountainous region before and after an economic rebound. In 1990, the local economy and health care system collapsed because of the closure of a series of manufacturing plants; outward migration from the area peaked. Between 1990 and 1993, new industries opened, and state and private community assistance programmes intervened, resulting in an economic rebound, migration into the area, and marked growth of the health service sector. PARTICIPANTS: A 2% sample of residents of households, using a combination of random, stratified, and clustered sampling. Residents included in the study had lived within the area throughout the 1990-1993 period of the study. MAIN RESULTS: Stable, non-migrating residents had a statistically significant 7% reduction in health status between 1990 and 1993, as measured by a composite of subjective and objective measures. The non-migrating residents also had a significant decrease in average household income ($14,700 in 1990 and $12,400 in 1993 in constant 1990 dollars) during the strong economic expansion, and therefore did not participate in or receive direct economic benefit from the expansion. There was a rapid population increase during the expansion, attributable to inward migrants who were younger and healthier than existing residents. The decline in health for the non-migrating residents was tentatively attributed to either direct or indirect effects of the decline in family income. CONCLUSIONS: Local economic development accompanied by expanded health care services availability can leave existing area residents poorer and less healthy, and this problem may be masked by an abundance of healthier, wealthier inward migrants.

Adolescent↗

Ethical considerations in international HIV vaccine trials: summary of a consultative process conducted by the Joint United Nations Programme on HIV/AIDS (UNAIDS).

Research that is initiated, designed or funded by sponsor agencies based in countries with relatively high social and economic development, and conducted in countries that are relatively less developed, gives rise to many important ethical challenges. Although clinical trials of HIV vaccines began ten years ago in the US and Europe, an increasing number of trials are now being conducted or planned in other countries, including several that are considered "developing" countries. Safeguarding the rights and welfare of individuals participating as research subjects in developing countries is a priority. In September, 1997, the Joint United Nations Programme on HIV/AIDS (UNAIDS) embarked on a process of international consultation; its purpose was further to define the important ethical issues and to formulate guidance that might facilitate the ethical design and conduct of HIV vaccine trials in international contexts. This paper summarises the major outcomes of the UNAIDS consultative process.

AIDS Vaccines↗