An economic model for the quality selection problem

The object of an economic model for the quality selection problem is to select the best parameter value for an input quality characteristic (X) so that the quality loss incurred on an output quality characteristic (Y) is minimized. The relation function between Y and X is assumed to be known throughout the article. In the work of Taguchi's experimentations, the selection of best parameter values is solved by two-step optimization when Y is adjustable. In the article, it is further extended to the case where Y is non-adjustable. An economic quality selection model with a general relation function is proposed based on a Taylor-series method for both adjustable and non-adjustable cases. A special case of a quality selection model with a quadratic relation function is also studied. A circuit example provided by Taguchi is presented to illustrate the use of this model.     

Preelection Polling in the 1982 Illinois Gubernatorial Contest

All the polls in advance of the 1982 Illinois gubernatorialelection proved incorrect in their prediction of a substantialvictory for James Thompson, the Republican. After examiningsome of the popular explanations for the "missed call," thispaper shows that while the voters "preferred" Thompson, therewas a very substantial increase in the number of straight partyballots cast for the Democrats, compared to 1978. This paperconcludes that in those states where straight party vote isan option, the poll takers probe for the possibility of a partyline vote. Information used in this paper to examine five hypothesesstems from a preelection poll of 1,200 Illinois voters.     

基于收益率倒数损失的投资组合指标

本文针对Markowitz均值 -方差投资模型所产生效率前沿的高收益高风险现象,以收益率倒数之投资损失函数为基础,提出一个可以适当地反映期望收益率与风险间均衡关系的投资组合指标 (IR)。透过实例验证。IR指标的适用性得以确认,同时也发现以“差异系数”作为组合投资指标并不适用于高收益高风险的情况。     

MORTGAGE LENDING TO MINORITIES: WHERE'S THE BIAS?

This paper examines mortgage lending and concludes that studies based on data created by the Boston Fed should be reevaluated. A detailed examination of these data indicates that irregularities in these data, when combined with the most commonly used research methodology, appear to have biased previous research toward a finding of discrimination against minority applicants. When the most severe data irregularities are eliminated, evidence to support a hypothesis of discrimination disappears. The currently fashionable "flexible" underwriting standards of mortgage lenders may have the unintended consequences of increasing defaults for the "beneficiaries" of these policies. (JEL J7, G28)     

Ambiguity and User Involvement: Issues Arising in Assessments for Young People and their Carers

Correspondence to Peter R. Day CRSP, Department of Social Sciences, Loughborough University of Technology, Loughborough, Leicestershire LE 11 3TU. Summary Issues for service users and professional staff arising fromcontemporary community care policies emphasizing user involvementare reviewed. Against the background of a key expression ofthese policies, the Disabled Persons' Act of 1986, methods ofproviding assessments involving young people with learning disabilitieswere analysed. Problems identified for further study includeddifficulties arising for young people due to lack of experienceand immaturity, the low expectations of their parents or carers,problems arising from the culture of services and how assessmentsmay be developed which provide seriously disabled users themselveswith ways of expressing their wants and needs.     

An Interview: Constructing Reality

Summary This paper is concerned with the relevance of interactionistperspectives in sociology to social work practice. Crucial tothese perspectives are the ‘meanings’ that peoplegive to situations and the ways they interpret actions. Basically,they are grounded on the assumption that there is no such thingas a single social reality. There are many different constructionswhich depend on the identities of the different people involvedand on the context in which they occur. The paper is based ontape recorded excerpts from an interview between a client, MrsSmith, and a social worker, from a discussion about some aspectsof that interview between the social worker and the writer,and from a discussion about the case between the team leaderand the writer. This material suggests different interpretationsof the situation, information gained in the discussion withthe social worker providing new ideas about the original interview.The views of the different people involved indicate that itis helpful to take into account the organizational context ofthe interviews. It is also suggested that conceiving of interviewsas ways of constructing reality has implications for the studyof social work practice.