Consistency of the least median of squares estimator in nonlinear regression

Recent research by Sakata and White (1995) presents the consistency and asymptotic normality of S-estimators in nonlinear regression. It is well known from research in linear regression that it is important to use a consistent high breakdown estimator as an initial estimate when computing an S-estimate. This paper presents the proof of the weak consistency of the least median of squares estimator in a nonlinear regression setting, thus suggesting that it is a reasonable choice for the starting value for computing S-estimates in nonlinear regression.     

Measuring the effect of sex preference on fertility: The case of Korea

Preferences for male or female children or a balanced number of sons and daughters are common throughout the world. The dominant preference is for male offspring, particularly in less developed countries. Strong son preference is often tempered, however, by a desire to have at least one child of each sex. In more developed countries a balance preference is more common, often together with a strong preference for the first child to be a son. Although it is usually assumed that sex preference can substantially influence fertility, some analysts argue that the effect is negligible. An intermediate position is taken by those who say that sex preference may not have much impact at high fertility levels, but that as average family sizes begin to fall, sex preference will become a more important factor in fertility decisions. Despite the keen interest that has been shown in sex preference, there is surprisingly little empirical evidence of its effects on fertility. Moreover, much of the research in this area is methodologically weak. The measures that have been used in the past have been subject to a number of criticisms that call their results into question. This paper proposes a new measure of the effect of sex preference on fertility that avoids many of the problems inherent in other methods. The measure is based on widely available survey data on the sex composition of children and can be used with any measure of fertility or family planning. It can handle any type of sex preference and does not assume a linear relationship between sex preference and fertility.(ABSTRACT TRUNCATED AT 250 WORDS)     

Personality Similarity-Dissimilarity and Underlying Psychopathology in Couples Seeking Marital Counseling

Two hypotheses related to the conceptualization of marriage as an interaction relationship and marital dysfunction as interpersonal pathology were tested empirically. Thirty first-married couples asking specifically for marital counseling from a community counseling service were administered Cattell's Sixteen Personality Factor Questionnaire. Husband and wife inter-correlations on each of the 16 first order and 2 second order factors were derived. Male and female mean sten scores on Neuroticism and Psychoticism were also derived. Data analysis revealed support for the second but not the first hypothesis.     

Help available--phenomenological models for research on aging

In "Help Wanted: Physiologists for Research on Aging," George Martin challenged the scientific community to find better means of tackling aging of the whole organism. Although initiatives such as those proposed by Martin would be most welcome, we propose an additional means by which scientists can take into account the integrative response of the organism and its changes over time. This method consists of systematizing facts that cannot necessarily be explained by considering those facts in isolation.     

Risk Analysis, Life Cycle Assessment—The Common Challenge of Dealing with the Precautionary Frame (Based on the Toxicity Controversy in Sweden and the Netherlands)

Life cycle impact assessment (LCIA) and comparative risk assessment (RA) use the same building blocks for analyzing fate and potential effects of toxic substances. It is tacitly assumed that emission-effect calculations can give uniform and decisive answers in debates on toxicity problems. For several decades, mainstream policy sciences have taken a different starting point when analyzing decision making on complex, controversial societal issues. Such controversies in essence are thought to be caused by the fact that different actor coalitions adhere to a different, but in scientific terms equally reasonable, conceptualization or "framing" of the problem. A historical, argumentative analysis of the Dutch chlorine debate and the Swedish PVC debate shows that this is also true in the discussions on toxic substances. Three frames have been identified, which were coined the "risk assessment frame," "the strict control frame," and the "precautionary frame." These frames tacitly disagree about the extent of knowledge/ignorance about the impacts of substances, the robustness/fallibility of emission-reduction schemes, and the robustness/vulnerability of nature. The latter frame, adhered to by environmentalists, seeks to judge substances mainly on their inherent safety. Under the current institutional arrangements and practices, RA and LCIA are executed mainly in line with the philosophy expressed by the risk assessment frame. This article gives various suggestions for dealing with framing in debates on toxic substances. One of the options is elaborated in somewhat more detail, i.e., the development of multiple indicators and calculation schemes for RA and LCIA that reflect the different frames. An outline is given for a possible indicator system reflecting the precautionary principle.     

Customer incivility and employee well-being: testing the moderating effects of meaning,perspective taking and transformational leadership

This study investigated factors that influence the relationship between experiencing customer incivility and the psychological well-being of employees in the service industry (N?=?215). Using the cognitive appraisal theory of stress, we identified and tested three factors that may buffer employees from the negative effects of customer incivility: finding meaning in work, perspective taking, and transformational leadership of supervisors. Transformational leadership was found to moderate the relationship between customer incivility and employee well-being. Meaning and perspective taking did not moderate the relationship between customer incivility and employee well-being, but did have a positive association with employee well-being. These findings contribute to the literature on customer incivility and suggest that organization-based resources that influence both primary and secondary appraisal, such as transformational leadership, are useful in buffering the harmful employee outcomes related to customer incivility.     

走出美学与“否定美学”的困惑——对话当代环境美学家阿诺德·柏林特

美学学科最初诞生时有两个基本定位,一是感知,二是情感。感知本是美学一词的词源学内涵,因此理应成为美学研究的首要因素,但西方美学界长期以来却忽略了这一点。美学学科要获得新的发展,不仅应重新恢复感知的应有地位,同时也需要在新的条件下对其内涵进一步丰富和更新。情感虽然一直处于美学研究的核心,但在美学界却遭到了误解和误用,再加上其本身内涵的不确定性,从而使它对审美经验的解释能力大大降低。而中国传统文化中对情感的解释则可能为当今的美学思考提供一些新的启示。由于审美经验的价值既可以是肯定性的也可以是否定性的,在美学中引入否定美学和否定美学价值便极为重要。这不仅扩展了美学的研究范围,也提高了美学的实践意义。但如何才能使美学在环境干预和环境优化方面真正发挥作用,还需要进一步研究和探索。