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261.
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Norman K. Denzin 《Symbolic Interaction》1979,2(1):59-72
A symbolic interactionist approach to the study of social organizations is specified. Materials are drawn from an on-going investigation of the American liquor industry, which is treated as a fragmented organization. The core actors, activities and interactional locales of the industry are identified. The problems of establishing a historical baseline for a case study are discussed, as are the problems of confronting archival data, locating informants, and establishing interactive linkages. The stages in writing a case history of an organization are presented and illustrated with examples drawn from the American liquor industry. 相似文献
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The usefulness of an extra sum of squares statistics QK for detecting K outliers has been discussed previously in the context of two-way tables. (See Gentleman and Wilk, 1975a, 1975b; John and Draper 1978; and Draper and John, 1980,) That work is extended here to straight line regression situations arising from, and motivated by, a specific set of research data. Percentage points for the appropriate test statistics are obtained by simulation, and approximations for these percentage points are suggested. Power calculations made for various designs and outlier situations are briefly summarized. 相似文献
266.
Jared Verner Robert Pastorok Joel O'connor William Severinghaus Norman Glass Norman Glass 《The American statistician》2013,67(4):393-402
Most of what is currently known about ecosystems derives from two sources: comprehensive studies by classical ecologists and economically motivated studies by resource specialists. The former have traditionally concentrated on natural or long-undisturbed ecosystems, the latter on those few species in managed or polluted ecosystems that are harvested, hunted, or fished. A recent genre of legislation, drafted with insight provided by the scientific community, recognizes the dearth of ecological information on managed or polluted communities (which are becoming far more ubiquitous and important) and dramatically raises the requirements for comprehensive data and data analyses to guide managerial and pollution abatement policies. This paper describes several important current efforts to use ecological community structure analyses to implement and enforce such legislation and some effects of such analyses on environmental policy. 相似文献
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Sarah K. Mincey Miranda Hutten Burnell C. Fischer Tom P. Evans Susan I. Stewart Jessica M. Vogt 《Urban Ecosystems》2013,16(3):553-571
A decline in urban forest structure and function in the United States jeopardizes the current focus on developing sustainable cities. A number of social dilemmas—for example, free-rider problems—restrict the sustainable production of ecosystem services and the stock of urban trees from which they flow. However, institutions, or the rules, norms, and strategies that affect human decision-making, resolve many such social dilemmas, and thus, institutional analysis is imperative for understanding urban forest management outcomes. Unfortunately, we find that the definition of institutions varies greatly across and within disciplines, and conceptual frameworks in urban forest management and urban ecosystems research often embed institutions as minor variables. Given the significance of institutional analysis to understanding sustainable rural resource management, this paper attempts to bring clarity to defining, conceptually framing, and operationally analyzing institutions in urban settings with a specific focus on sustainable urban forest management. We conclude that urban ecologists and urban forest management researchers could benefit from applying a working definition of institutions that uniquely defines rules, norms, and strategies, by recognizing the nested nature of operational, collective choice, and constitutional institutions, and by applying the Institutional Analysis and Development framework for analysis of urban social-ecological systems (SESs). Such work promises to spur the desired policy-based research agenda of urban forestry and urban ecology and provide cross-disciplinary fertilization of institutional analysis between rural SESs and urban ecosystems. 相似文献
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China's one-per-hundred population survey, conducted in mid-1987, provides the first nation-level data with which to study recent fertility change in China. Using a recently developed extension of the ‘own-children’ method of fertility estimation, period parity progression ratios are computed from the survey data. Comparison with similar statistics computed from the 1982 one-per-thousand fertility survey provides a rigorous check on the quality of the results. The level of fertility so measured rose by 13 per cent between 1985 and 1987, compared with an increase of eight per cent in conventional total fertility ratios. Nearly 90 per cent of the increase was due to rising levels of progression from first to second birth. There can be little doubt that this, in turn, was due to a relaxation in the one-child family policy. Overall levels of progression to births of higher orders have been declining since 1982, but the evidence suggests that this is so only because of stringent government efforts to control births of third and higher orders. 相似文献
270.
Norman L. Johnson 《统计学通讯:理论与方法》2013,42(6)
In theorem 3.1 of Chen and Hsu (1995) an expressin for an upper confidence bound for Cpmk in the case when µ = M and so Cpmk = Cpm, is given as a multiple of Cpm. However, if the value µ = M known then it would be more reasonable to use the estimator obtained by replacing Xn by M. 相似文献