MEASURING THE INTERNET: HOST COUNTS VERSUS BUSINESS PLANS

The excessive media attention in and economic hopes placed on the Internet mean that measures of its size and distribution have been undertaken more often with an eye to business plans than to methodological rigour.This paper examines one disinterested source of Internet statistics, the Internet Domain Survey, to provide accurate measures of Internet size and distribution. Methodological issues in utilizing this survey are discussed to ensure the significance of findings is understood and to identify key methodological problems in a new field of research. Two particular problems are identified; the need to define user per computer host ratios and to identify the national origin of computers with international domain names. Statistics are presented from the five Internet Domain Surveys from January 1998 to January 2000 in the following categories: overall size, regional distribution, human development and economic distribution, linguistic distribution and user numbers. The conclusion is reached that even as the Internet is growing in all regions world-wide it remains concentrated in the highly developed nations. Some consideration of the implications of this for wider debates around the Internet is given.     

Invertebrate diversity in newly established mulch habitats in a Midwestern urban landscape

The invertebrate fauna in artificial urban habitats has yet to be systematically investigated. The current field study in central Ohio was undertaken to assess the numbers and types of macroinvertebrates in mulched and unmulched plots during a one-year period. Invertebrates quickly infiltrated the plots with bare soil (control) and any of four types of mulch (shredded hardwood, shredded recycled wood, pine bark mini-nuggets, and pea gravel). One month after establishing the plots, invertebrates were present in numbers comparable to subsequent months. Invertebrates found in the plots were primarily saprophytic taxa: millipedes (32.6%), segmented worms (19.8%), isopods (6.7%), and various beetle families (1.5%). Predatory taxa included centipedes (9.8%), ants (9.7%), carabid beetles and staphylinid beetles (7.3%), and spiders (0.9%). Types of invertebrates were similar in all ground cover types, but numbers of invertebrates differed significantly. Invertebrates were present year-round in mulched plots, and plots with organic mulch harbored significantly more invertebrates than plots mulched with pea gravel. Bare soil always contained the fewest number of invertebrates. There was no significant difference in numbers of invertebrates based on the cardinal side of the building.     

Parental grief after a child's drug death compared to other death causes: investigating a greatly neglected bereavement population

This comparative survey contrasted 571 parents who lost children to various death causes: 48 to drug-related deaths and overdoses, 462 to suicide, 24 to natural death cases, and 37 to mostly accidental death cases. Groups were compared in terms of grief difficulties, mental health problems, posttraumatic stress, and stigmatization. Results did not show any appreciable differences in these respects between the suicide bereaved parents and those losing children to drug-related deaths. However, when the suicide and drug-related death survivors were specifically contrasted against accidental and natural death loss cases, a consistent pattern emerged showing the former group was consistently more troubled by grief and mental health problems than the latter two sub-groups. These differences remained when controls of time since the loss and gender differences were employed as covariates. These findings suggest that the powerful and intense stigma against drug use and mental illness, shared among the public-at-large, imposes challenges in healing of immense proportion for these parents as they find less compassionate responses from their significant others, following their losses.     

Migrant Parents and the Psychological Well-Being of Left-Behind Children in Southeast Asia

Several million children currently live in transnational families, yet little is known about impacts on their health. We investigated the psychological well-being of left-behind children in four Southeast Asian countries. Data were drawn from the CHAMPSEA study. Caregiver reports from the Strengths and Difficulties Questionnaire (SDQ) were used to examine differences among children under age 12 by the migration status of their household (N = 3,876). We found no general pattern across the four study countries: Indonesia, the Philippines, Thailand, and Vietnam. Multivariate models showed that children of migrant fathers in Indonesia and Thailand are more likely to have poor psychological well-being, compared to children in nonmigrant households. This finding was not replicated for the Philippines or Vietnam. The paper concludes by arguing for more contextualized understandings.     

Identifying the causal pathways from religiosity to delayed adolescent sexual behavior

This study used the Integrative Model as a framework to examine whether religiosity delays onset of coitus among a longitudinal sample of virgins, and investigated the causal pathways of this relationship. In addition, this study examined the behavioral beliefs about the consequences of engaging in sex, which distinguishes between youth who vary in level of religiosity. A further analysis was also conducted to examine whether religiosity offers protective effects in terms of progression toward sexual intercourse on a sexual behavior index. The sexual behavior index assumes a progressive nature of sexual behaviors, and includes the following seven behaviors: kissing, having breasts touched (touching for boys), genital touching, receiving oral sex, vaginal intercourse, giving oral sex, and receiving (or giving) anal sex. Religiosity at baseline was negatively associated with sexual debut one year later. This relationship was mediated through attitudes toward personally engaging in sexual intercourse. Religiosity at baseline was also negatively associated with scores on the sexual behavior index one year later. These results suggest that religiosity offers protective effects for both coital and noncoital sexual behaviors.     

Assessing health-related resources in senior living residences

This study evaluated a new tool, “The Audit of Physical Activity Resources for Seniors” (APARS), which assesses the physical activity environment in Senior Living Residences (SLRs). Audits were conducted in 29 SLRs and inter-rater reliability was assessed. Pearson correlations were examined between APARS items and objectively measured physical activity and sedentary time, and self-rated health, collected from residents at a subset of 12 SLRs (N = 147). Eighty-nine of the 90 items (98.9%) demonstrated Kappa or ICC values above .70 and/or percent agreement above 80%. The 90 items were summarized into nine scales. Two scales (outside supportive physical activity features/functionality and outside exercise facilities) were related to greater physical activity and less sedentary time. Four scales (inside social facilities, onsite services, exercise programs, and social activities) were related to greater sedentary time and better self-rated health. APARS items demonstrated adequate inter-rater reliability and some evidence for construct validity to assess health-related environments in retirement facilities. Social activities in SLRs could benefit residents by incorporating more physical activity. Use of APARS could inform more health-promoting designs of senior living facilities.     

Social Workers' Understanding of Autistic Spectrum Disorders: An Exploratory Investigation

How social workers perceive autistic spectrum disorders (ASD)will inevitably impact upon how they assess the needs of childrenwith ASD and their families, and upon the types of service orinterventions they seek to provide to meet those needs. However,little is known of social workers’ understanding of thecondition. Using a research instrument devised by Mavropoulou and Padeliadu (2000),a study was carried out of all social workers working with disabledchildren in an English local authority. The results showed thatthough many workers had a good understanding of some aspectsof the condition, there was also confusion about some key factsconcerning ASD, the characteristics of ASD and scientific terminology,an inaccurate understanding of intervention approaches, anda more positive attitude towards the ability of generic servicesto meet need than was supported by the literature. Implicationsare discussed in terms of the provision of services to familiesof children with ASD in the UK, and the limitations of thisstudy are recognized.     

Discounting statistical lives

Benefit-cost analysis of government projects that reduce health risks over an extended period of time requires an estimate of the value of a future life. This in turn requires a discount rate. We suggest and carry out a method to estimate the discount rate using observations on discrete choices between projects with different time horizons. This method is implemented in a survey context. For our primary example, the estimated median discount rate is close to the market rate. A substantial proportion of the sample is estimated to have quite low discount rates. We provide some evidence that discount rates may differ for different types of risks.This research was supported in part by the U.S. Environmental Protection Agency under Cooperative Agreement in Environmental Economics Research CR-813557-01-0. The opinions expressed do not necessarily reflect the views of the U.S. Environmental Protection Agency. We would like to thank Paul Portney for bringing the importance of discounting statistical lives to our attention, and John Conlisk, Maureen Cropper, Mark Machina, Robert Mitchell, Peter Navarro, and Walter Oi for helpful comments.     

Utility theory and the Bayesian paradigm

In this paper, a problem for utility theory - that it would have an agent who was compelled to play Russian Roulette with one revolver or another, to pay as much to have a six-shooter with four bullets relieved of one bullet before playing with it, as he would be willing to pay to have a six-shooter with two bullets emptied - is reviewed. A less demanding Bayesian theory is described, that would have an agent maximize expected values of possible total consequence of his actions. And utility theory is located within that theory as valid for agents who satisfy certain formal conditions, that is, for agents who are, in terms of that more general theory, indifferent to certain dimensions of risk. Raiffa- and Savage-style arguments for its more general validity are then resisted. Addenda are concerned with implications for game theory, and relations between utilities and values.