Majority vote of even and odd experts in a polychotomous choice situation

The performance of majority vote by an odd number of voters in a dichotomous situation is a much-studied subject. In this paper, we study the performance of group consensus in a situation of polychotomous choice. The differences in majority vote behaviour between even and odd numbers of expert panellists are examined, and the effects of adding new members are derived. Unlike the dichotomous model, optimality in the present context may not be uniquely defined, so the probabilities of the consensus being correct or erroneous are both considered as the number of experts is increased.     

Repositioning Risk in Social Work Education: Reflections Arising from the Threat of SARS to Social Work Students in Hong Kong during their Field Practicum

The social work profession has always been involved in dealing with uncertainty and risk in the life politics of clients. However, it is not easy for young social work students to translate this philosophical disposition into their real life practice with clients. In spring 2003, when the SARS epidemic broke out in Hong Kong, a group of social work students from the Chinese University of Hong Kong were doing their fieldwork practicum. Suddenly confronted by a collective sense of risk in their role as social workers, the students went through a period of unrest, as performing their helping duties brought with it a simultaneous exposure to personal risk. This paper is based on four focus group interviews with these social work students, to understand how they processed their experience of risk during their exposure to the SARS crisis, and how they connected the experience to their social work practice with clients. It is found that the predicament arising from the exposure to personal risk brought about by the SARS crisis during the students' field placement engendered the reflective process that enabled a renewed and personalized meaning of professionalism. The results provide a basis for reflection among social work educators on the role of risk in the training of prospective social workers, and on how social work education can better prepare students for practice in a high‐risk environment.     

The Dawn is Too Distant: The Experience of 28 Social Work Graduates Entering the Social Work Field in China

Nurturing new, competent social work professionals requires multilevel preparation extending from school to the workplace. However, not much has been done to understand this school-to-work transition process in countries where the social work profession is still in an early stage of development. This paper reports the findings of an exploratory qualitative study of 28 new social workers in China, where social work is an emerging profession, on how they entered the field and what challenges they encountered. Their stories indicate that what they learned in school did form a foundation for the establishment of their professional identity in the workplace. However, due to workplace politics and to the lack of recognition of their professional status, they experienced an unsettling induction process. Coupled with the challenges of inadequate financial compensation, the careers of these new social workers may face an early end despite the great future for the profession promised by the government. Implications of this study for social work education in China are also discussed.     

The variance of population characteristics in stable populations, with applications to the distribution of income

Summary Stable population theory has recently been used to analyse the effects of changes in fertility and mortality on economic variables such as income per head. In this paper more general results are derived to describe the effects of changing vital rates on the variance and higher moments of the distribution of some age-dependent variable. Simple analytical expressions are derived which decompose the effects of changes in age structure into the effects on inter-cohort and intra-cohort variance. The results are easily applied to standard measures of the distribution of income. By combining the analytical results with actual age profiles of income and income variance from the United States and Brazil it is observed that both the magnitude and direction of the effects of population growth on measured inequality are sensitive to the specific age profiles used. The most surprising result is that the Brazilian age profiles suggest that higher growth rates may actually reduce measured inequality, although the effect is relatively small.     

Parental Influence and Academic Achievement among Middle School Students: Parent Perspective

This study examined the effects of parental influence on middle school students' academic achievement. The sample included 32 parents of middle school students. The questionnaire measured: parental pressure and support; parental help, monitoring, and press for literacy; and communication. There was a relationship that approached significance between communication and academic achievement: as communication increased, academic achievement increased. There was also a relationship that approached significance between parental help, monitoring, and press for literacy and parents' highest level of education: the higher the level of education of parents, the more involved parents were. The implication for school social workers is discussed.     

Late-Life Depression,Social Support,Instrumental Activities of Daily Living,and Utilization of In-Home and Community-Based Services in Older Adults

This study examined the relationship between social support, depression, instrumental activities of daily living (IADLs), and utilization of in-home and community-based services. The sample included 39 adults age 65 years old and older. The data were collected by distributing a self-administered questionnaire. Depression levels significantly decreased as levels of social support increased. IADLs functioning significantly decreased as depression levels increased. The number of in-home services used significantly increased as IADLs functioning decreased. The number of community-based services used significantly increased as depression levels decreased. The number of in-home and community-based services used significantly increased as levels of support decreased.     

The Perspectives of Latina Mothers on Latina Lesbian Families

The purpose of this study was to explore the attitudes and perceptions of 15 Latina mothers towards Latina lesbian parents. A semi-structured interview guide was used to collect the data. While most respondents reported that Latina lesbians' parenting children was normal, they were concerned that by being raised by the Latina lesbian mothers, the children would be confused about their own sexual preference and that they would be teased by their peers. Respondents also reported that children raised in a lesbian household without having a male figure might experience difficulties in adjustment. Respondents reported that religion, how they were raised, and the Latino culture impacted attitudes toward lesbians as parents. Implications of findings are discussed.     

Perpetuating Old Exclusions and Producing New Ones: Digital Exclusion in an Information Society

This article presents a study that measures the degree of digital exclusion—or, conversely, the degree of digital inclusion—in Hong Kong, a developed city in East Asia. Governments in the region are among the most active in the developed world in pushing ahead in developing knowledge economies and information societies. The major concern is to improve/maintain their competitiveness in the new knowledge economy created by the process of globalization and the advancement in information technology. Many countries in the region have established themselves in the top ranks of a number of indexes and measurements comparing digital readiness, digital access, information and communication technology penetration, and others. However, not all the citizens in the region share the benefits and promises of the information society. People who are traditionally disadvantaged, such as the elderly and those on a low income, are further excluded from the information society. Such exclusion affects other social groups as well. This study creates a new digital inclusion index to measures the degree of inclusion of various disadvantaged groups in an information society. Data regarding seven disadvantaged groups were collected through a household survey (N = 2,312). The index captures information about access, knowledge, usage, and affordability ininformation and communication technology of the disadvantaged in comparison with mainstream society (N = 284).     

Factorial experiments in the analysis of assembly systems

Assembly systems are a key tool for mass production and are increasingly being implemented in the manufacturing industry. Since the performance of such systems depends on the levels of many design variables, they are not well understood. In this paper, the performance of free transfer automatic assembly systems with closed inspection and repair loops is studied via factorial experiments of a simulated system. Five factors were identified that affect the throughput of the system: buffer size, number of pallets in the system, number of repair stations, repair time of jammed assembly machines, and subcomponent defect rate. Initially, two levels of each factor were considered, so that a full 2 5 factorial design of the experiment was used to study the system. Next, to develop a deeper understanding of the linear or non-linear effect of each factor, additional levels were investigated. Finally, a predictive model is proposed. Engineers and system designers can use this predictive model to estimate the performance of the system, given a combination of levels of each of the five factors that we studied.     

Population growth,age structure,and age-specific productivity

Motivated by empirical evidence that fluctuations in age structure affect relative wages across age groups, this paper asks whether there is a steady-state age distribution that maximizes the lifetime wages of a representative worker. The paper proves the surprising result that in a pure labor economy with any constant returns technology, a uniform age distribution minimizes lifetime wages. Skewed age distributions, generated by either positive or negative population growth rates, generate unambiguously higher lifetime wages than a stationary population, in spite of possible reductions in per capita output in every period. The presence of non-labor factors complicates, but does not necessarily reverse, this result. The paper relates the beneficial effects of higher rates of population growth on lifetime wages in a pure labor economy with imperfect substitutability across age groups to the benefits of population growth that appear in overlapping-generation consumption loan models with intergenerational transfers.A previous version of this paper was presented at the Economic Demography Workshop at the 1988 meetings of the Population Association of America. Helpful comments from Mark Berger, Theodore Bergstrom, Ronald Lee, Hal Varian, and Robert Willis are acknowledged.