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101.
This paper explores the relationship between concentration and control, in terms of both markets and hierarchies in economics and their analogues of polities and parties in politics. It is argued that the relationship is not always a positive one. In some cases the relationship is negative and in other cases there is no relationship at all. Insight into the determinants of the nature of this relationship can be gained by explaining apparent inconsistencies which appear when contrasting the economic and political spheres. For example, why is it that a market which meets the criteria for perfect competition—many small producers—is considered socially optimal but not so a polity comprised of many small parties? The two-party system, considered desirable in our national politics, corresponds to the much maligned duopoly in the economic sphere. This paper posits that there are three major types of systems found in both the economic and political spheres, which apply to both levels of aggregation—firms and markets, and parties and polities, respectively—and which have different implications for the relationship between concentration and control. It is also argued that these two levels of aggregation, however useful or necessary for purposes of discussion, are not analytically distinct. 相似文献
102.
This paper examines the long-term patterns of migration within China between 1950 and 1988. The analysis uses data from China S 1988 211,000 Fertility and Birth Control Survey, which asks respondents about their most recent interprovincial move. The results suggest that long-term migration patterns can be explained by political and economic changes in China. We argue that the approaches we introduce can offer significant insight into long-term migration patterns for countries where historical data on migration are unavailable or unreliable. 相似文献
103.
Mathematics is needed especially and primarily for helping coax social phenomena sufficiently into view to permit the sorts of reconstruing, manipulation, and measurement on which productive insight depends. I develop this view in two themes, language use and social space-times, along with two morals, and several object lessons, all leading up to the Knotty Future. I conclude with a discussion of pitfalls in this view. 相似文献
104.
Sillitoe K White PH 《Journal of the Royal Statistical Society. Series A, (Statistics in Society)》1992,155(1):141-163
"The 1991 census contained, for the first time, a question on the ethnic group of each member of the population of Great Britain. This paper reports on how a question was developed which has a sufficiently high degree of acceptance from all the main ethnic groups, and which is answered sufficiently accurately, to justify inclusion in the census." 相似文献
105.
The algebraic definitions presented here are motivated by our search for an adequate formalization of the concepts of social roles as regularities in social network patterns. The theorems represent significant homomorphic reductions of social networks which are possible using these definitions to capture the role structure of a network. The concepts build directly on the pioneering work of S.F. Nadel (1957) and the pathbreaking approach to blockmodeling introduced by Lorrain and White (1971) and refined in subsequent years (White, Boorman and Breiger 1976;Boorman and White 1976; Arabie, Boorman and Levitt, 1978; Sailer, 1978).Blockmodeling is one of the predominant techniques for deriving structural models of social networks. When a network is represented by a directed multigraph, a blockmodel of the multigraph can be characterized as mapping points and edges onto their images in a reduced multigraph. The relations in a network or multigraph can also be composed to form a semigroup.In the first part of the paper we examine “graph” homomorphisms, or homomorphic mappings of the points or actors in a network. A family of basic concepts of role equivalence are introduced, and theorems presented to show the structure preserving properties of their various induced homomorphisms. This extends the “classic” approach to blockmodeling via the equivalence of positions.Lorrain and White (1971), Pattison (1980), Boyd, 1980, Boyd, 1982, and most recently Bonacich (1982) have explored the topic taken up in the second part of this paper, namely the homomorphic reduction of the semigroup of relations on a network, and the relation between semigroup and graph homomorphisms. Our approach allows us a significant beginning in reducing the complexity of a multigraph by collapsing relations which play a similar “role” in the network. 相似文献
106.
A significant number of workers suffer a variety of physical symptoms and illnesses associated with poor indoor air quality. These authors furnish employers with a guide for providing clean air in the workplace--an objective the achievement of which will reduce employee absenteeism and medical insurance costs, while increasing productivity and morale. 相似文献
107.
108.
The intuitive detection theorist (IDT) model of trust posits that trust in hazard managers stems from judgments about their performance on three criteria: their ability to discriminate safe from dangerous situations (discrimination ability); their tendency under uncertainty to assume danger is present (response bias); and their propensity to be open and honest with the public about events (communication bias). The current article tests the model's robustness using findings from three experiments and four surveys conducted by two different research teams. Study‐specific analyses and an overall analysis of the seven studies combined confirm that all three of the IDT model's dimensions are important for trust, explaining on average 43% of trust variance. These effects occurred largely independently of hazard topic, research method, or investigator. Hypothesized interaction effects among the dimensions, based upon earlier studies, were weak and contradictory; this is the first known study of interactions among trust model variables. 相似文献
109.
We study variations in the severity of the 1997 financial crisis in a sample of 25 developing countries. We use both currency depreciation and stock market returns as crisis measures. Our key findings are that countries that started 1997 with an exchange rate peg experienced significantly greater currency depreciation and significantly lower stock returns than would be predicted from the levels of various macroeconomic indicators. 相似文献
110.
Naomi Rosh White 《Children & Society》1998,12(1):48-59
In this paper, several aspects of autobiographical accounts of childhood are explored. The paper begins with a consideration of Freudian explanations of how recollections of childhood are bounded by memory. The distinctive form of definitions of oneself-as-child are then described and related to post-modern theories about the self. Finally, the ways in which recollections of childhood are framed by the subordinate position of children in the family and society are discussed. Six autobiographies were chosen for study. All were by Australian authors. The authors were Henry Handel Richardson, Ruth Park, Jill Ker Conway, Albert Facey, Hal Porter and Manning Clark. 相似文献