Nonparametric Instrumental Regression

The focus of this paper is the nonparametric estimation of an instrumental regression function ϕ defined by conditional moment restrictions that stem from a structural econometric model E[Y−ϕ(Z)|W]=0, and involve endogenous variables Y and Z and instruments W. The function ϕ is the solution of an ill‐posed inverse problem and we propose an estimation procedure based on Tikhonov regularization. The paper analyzes identification and overidentification of this model, and presents asymptotic properties of the estimated nonparametric instrumental regression function.     

Risk Modeling, Assessment, and Management of Lahar Flow Threat

The 1991 eruption of Mount Pinatubo in the Philippines is considered one of the most violent and destructive volcanic activities in the 20th century. Lahar is the Indonesian term for volcanic ash, and lahar flows resulting from the massive amount of volcanic materials deposited on the mountain's slope posed continued post-eruption threats to the surrounding areas, destroying lives, homes, agricultural products, and infrastructures. Risks of lahar flows were identified immediately after the eruption, with scientific data provided by the Philippine Institute of Volcanology, the U.S. Geological Survey, and other research institutions. However, competing political, economic, and social agendas subordinated the importance of scientific information to policy making. Using systemic risk analysis and management, this article addresses the issues of multiple objectives and the effective integration of scientific techniques into the decision-making process. It provides a modeling framework for identifying, prioritizing, and evaluating policies for managing risk. The major considerations are: (1) applying a holistic approach to risk analysis through hierarchical holographic modeling, (2) applying statistical methods to gain insight into the problem of uncertainty in risk assessment, (3) using multiobjective trade-off analysis to address the issue of multiple decisionmakers and stakeholders in the decision-making process, (4) using the conditional expected value of extreme events to complement and supplement the expected value in quantifying risk, and (5) assessing the impacts of multistage decisions. Numerical examples based on ex post data are formulated to illustrate applications to various problems. The resulting framework from this study can serve as a general baseline model for assessing and managing risks of natural disasters, which the Philippines' lead agency-the National Disaster Coordinating Council (NDCC)-and other related organizations can use for their decision-making processes.     

Making quality a fundamental part of strategy

All that is known about strategy and strategic planning indicates that quality is a major factor in gaining competitive advantage. It is cost effective, profitable, promotes corporate longevity and builds an important company value system. The authors argue that is too important a factor to be left solely to quality control personnel or planners and is a fundamental part of the chief executive's responsibility for the development of strategy.     

Market segmentation: an integrated framework

Contrary to the narrow, demand-oriented approach to market segmentation taken in much of the marketing and planning literature, this article illustrates a broader, integrated framework which includes both the demand and supply sides of the competitive equation. The author argues that starting with ‘product’ characteristics is both an easier and more actionable way of segmenting markets than the traditional marketing approach that typically begins with the customer or ‘people’ characteristics. This approach can be employed by a business to make decisions about entering a market segment, differentiating a brand from its competition, positioning it in the market and communicating its quality to the customers. Customers, too, generally rely on product characteristics to perceive and evaluate the quality claims made by different competitors. Thus, the article bridges an important gap between strategy formulation and strategy implementation: an area often neglected in the strategy literature. The proposed approach focuses not only on customer benefits or needs, but also on the resources necessary to satisfy them and demonstrates this with examples from Apple, Church & Dwight and many other companies. To show a practical application, the article presents a price-quality-benefit segmentation profile of the US toothpaste market which revealed three strategic groups.     

RDS的接收技术

讨论了广播多工（ＲＤＳ）的接收技术，给出了接收机的基本结构，它包括载波层、调制层、基带层的硬件结构，以及信号层（或数据层）的软件实现，并以自己的方法建立了样机模型。整个系统和ＥＢＶ的ＲＤＳ规范同我国刚制定的ＲＤＳ规范一致。     

Factors influencing middle and high schools' active parental consent return rates

The authors examined factors influencing the return rates for attempting to collect active parental consent forms from 21,123 students in the 7th through 10th grades in 41 middle and high schools. Overall return rates from middle schools were higher than from high schools. Schools that offered high levels of staff support for collecting consent forms had higher return rates. Procedures where the consent form was attached to a school form that parents had to complete and return to the school yielded the highest return rate. Implications for how researchers can obtain a high parent consent form return rate are discussed.     

Impact of interaction with a partner or friend on the exposure effects of pornography and erotica

Past studies on the effects of sexually explicit materials on women have tended to study them alone, in pairs, or in groups of strangers. By contrast, our study randomly assigned women to bring either a same-sex friend or a male partner to reflect more natural viewing conditions. Discussion between the participant and her companion followed exposure to the sexual images. Women who viewed pornography maintained their (quite high) level of negative mood, whereas women who viewed erotica experienced a substantial improvement in mood. The sex of the companion did not have a direct influence on participants' mood, with discussion improving mood across the board. However, participants' ratings of their satisfaction with the discussion were significantly influenced by the sex of their companion. We suggest that future research should focus more on the interpersonal aspects of male-female relationships when exploring the effects of sexually explicit materials on heterosexual women.     

A new approach in vocational rehabilitation in Iceland: preliminary report

The lack of vocational rehabilitation in Iceland inspired the Janus Rehabilitation initiative in the year 2000. The team currently consists of two occupational therapists, a social worker, a physiotherapist, a psychologist, and a physician. Janus uses resources from local education establishments and is located at the Reykjavík Technical School. A client-centred approach is used, enabling a flexible rehabilitation timeframe. The aim is to help the client back to employment/education. Advantage is taken of the facilities of the school where integration between education and rehabilitation takes place. Forty individuals have been admitted, with a mean time from work of 2.9 years, (range: 0-11 years). Seventeen (43%) have returned to employment/education. Twenty-three of those entering the programme are still on invalidity pension. The Canadian Occupational Performance Measurement (COPM) shows improvement in occupational performance and satisfaction. The Icelandic Quality of Life measurement also shows improvement. The results have been promising. However, a larger group is needed in order to draw clear unequivocal conclusions.     

Evaluating the administrative efficiency of courts

In addition to being held accountable for judicial decision, courts, like other public agencies, can and should be evaluated in terms of their administrative efficiency. This paper illustrates how courts can be evaluated in terms of their relative administrative efficiency, using a new approach—data envelopment analysis (DEA)—first proposed by Charnes et al. [1]. The DEA is based upon the economic notion of Pareto optimality which states that a given decision making unit (DMU) is inefficient if some other DMU, or some combination of other DMUs, can produce at least the same amounts of all outputs with less of some resource input and not more of any other resource. Conversely a DMU is said to be efficient if the above is not possible. Charnes et al. [1] generalized the usual input/output ratio measure of efficiency for a given unit in terms of a fractional linear program with fractional constraints. In the case of courts, the efficiency of any particular court is calculated by forming the ratio of a weighted sum of outputs to a weighted sum of inputs, where the weights for both outputs and inputs are to be selected in a manner that calculates the Pareto-Koopmans efficiency of the court. This paper reviews the DEA method and illustrates its application to a data base for 100 criminal superior courts in North Carolina.     

Uncle Long Legs' Letter Box; A Letter Counseling Service for Children in Hong Kong

During the growing up process, children face many challenges. They need support and guidance from adults whom they can trust. Uncle Long Legs' Letter Box provides a letter counseling service for children aged from around 10 to 14 years, who are mainly studying in primary four to junior secondary school. Using letters as the medium, children are encouraged to seek help from Uncle Long Legs when they are facing problems related to family, friendship, and study. In letters, children are often more willing to disclose their personal feelings and problems than they are in face-to-face contacts. The project was started in 1994 in a children and youth center. Up to July 2001, more than fifteen thousand letters have been received from about eight thousand children. Now the service has expanded to five centers and about 120 volunteer counselors are involved. This article summarizes the working experience of Uncle Long Legs' Letter Box and discusses the strengths and limitations of letter counseling to children.