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We analyse various Multiple Classification Analysis (MCA) methods to model trip production (generation). We first show that the MCA version most widely used in transport engineering implies a rarely feasible assumption, the transgression of which may drive a significant overestimation of the future number of trips and a systematic bias in its socio-economic composition. To illustrate this effect, we use Monte Carlo simulation and real data from Santiago, Chile to compare the various MCA approaches, concluding that the aforementioned form should be discarded. Our analysis also shows that the MCA method which is more robust to the structure of the underlying model, is the simple calculation of trip rates as averages for each category. Finally, we hint at the need to use more sophisticated formulations than MCA to model trip production. 相似文献
53.
Bowling alone but tweeting together: the evolution of human interaction in the social networking era
The objective of this paper is to theoretically analyze how human interaction may evolve in a world characterized by the explosion of online networking and other Web-mediated ways of building and nurturing relationships. The analysis shows that online networking yields a storage mechanism through which any individual contribution—e.g. a blog post, a comment, or a photo—is stored within a particular network and ready for virtual access by each member who connects to the network. When someone provides feedback, for example by commenting on a note, or by replying to a message, the interaction is finalized. These interactions are asynchronous, i.e. they allow individuals to relate in different moments, whenever they have time to. When the social environment is poor of participation opportunities and/or the pressure on time increases (for example due to the need to increase the working time), the stock of information and ties stored in the Internet can help individuals to defend their sociability. 相似文献
54.
The role of technology strategy in industrial strategies 总被引:1,自引:0,他引:1
Angelo Airaghi 《R&D Management》1996,26(3):197-198
55.
Dopo aver introdotto delle operazioni logiche fra eventicondizionati (che estendono opportunamente quelle usuali fra eventi), si definisce il concetto di iperprobabilità condizionata Si può così dare una interpretazione significativa della pseudodensità condizionata, introdotta da R. Scozzafava nell'inferenza statistica bayesiana.
By a suitable extension of the usual algebra of events, logical operations forconditional events are introduced. This leads to a definition of conditional iperprobability, which is the natural tool for a sensible interpretation of the concept of conditional pseudodensity, introduced by R. Scozzafava in Bayesian statistical inference.相似文献
56.
Angelo Reati 《Review of Political Economy》2013,25(4):609-617
Abstract This paper comments on a recent paper by Ernesto Screpanti (2003), in this journal, on Marxian theories of value and exploitation. The paper argues, in opposition to Screpanti, that the labour theory of value is the most suitable foundation for a realistic and historically determined vision of society; that labour values provide a unique coherent conceptual framework for understanding the nature of profit; that the inconsistency of labour values is only apparent, as it disappears with a judicious choice of numéraire; and that prices of production explain much less than labour values and are therefore an inadequate substitute for the latter. 相似文献
57.
Initial Impressions Determine Behaviours: Morality Predicts the Willingness to Help Newcomers 总被引:1,自引:0,他引:1
Stefano Pagliaro Marco Brambilla Simona Sacchi Manuela D’Angelo Naomi Ellemers 《Journal of Business Ethics》2013,117(1):37-44
Prior research has demonstrated the impact of morality (vs. competence) information for impression formation. This study examines behavioral implications of people’s initial impressions based on information about their morality vs. competence in a workplace. School teachers and employees (N = 79) were asked to form an impression of a new school manager (i.e. a prospective boss), who was presented as High vs. Low in Morality and High vs. Low in Competence. Results showed that morality information rather than competence information determined initial emotional responses to the new manager, which mediated willingness to help the newcomer adjust in task and social contexts. Results are discussed in terms of their theoretical and practical implications and future research directions are outlined. 相似文献
58.
J. Angelo Corlett 《Journal of Business Ethics》1998,17(1):99-103
This paper contains a philosophical explication of some of the essentials of a Marxist approach to business ethics. A Marxist approach is construed as a moral critique of capitalism. This paper hopes to lay the groundwork for a more detailed analysis of Karl Marx's critique of capitalist economies. 相似文献
59.
INTERPRETING EVENT CAUSES: THE COMPLEMENTARY ROLE OF CATEGORIZATION AND ATTRIBUTION PROCESSES 总被引:1,自引:0,他引:1
This study examined the complementary role categorization and attribution processes play in managers’interpretations of event causes. Categorization theory suggests that events with distinctive internal or external causes should be interpreted, respectively, as internal and external. Attribution theory and research on self-serving attributions, on the other hand, suggest that events with positive outcomes should be attributed to internal causes and events with negative outcomes to external causes. Study results showed a very significant interaction between distinctiveness of event causes (internal-external) and the valence of event outcomes (positive-negative). This interaction suggests that managers use categorization processes to interpret positive events, but more effortful attributional processes to interpret events with negative outcomes. There also was evidence of self-serving attributional biases in managers’interpretations of event causes, especially events with equivocal causes. Study findings appear to be unaffected by managerial position or background. We discuss the contribution this study makes to extant research and its implications for future research. 相似文献
60.
Angelo Melino 《Journal of economic surveys》1988,2(4):335-366
Abstract. The term structure of interest rates is an old topic. Over the years, both the hypotheses debated and the research techniques used have changed considerably. Two fairly recent developments which distinguish current research are the widespread adoption of rational expectations and the integration of the term structure with the general theory of asset pricing. This survey reviews previous work from this perspective. The main objective is to catalogue available evidence about term premia and to interpret this evidence in light of alternative models of term premia determination. 相似文献