18,547 research outputs found
Dancing behavior of Cosmopterix victor Springer, a species new to the fauna of China (Lepidoptera: Cosmopterigidae).
Zum ersten Mal wird ein Fund der Bambus fressenden Art Cosmopterix victor Stringer, 1930 vom asiatischen Festland gemeldet. Weiterhin wird das sehr auffällige Tanzverhalten dieser Art beschrieben und abgebildet. Dabei handelt es sich um eine spezielle Anpassung, um für eine Ansammlung der adulten Schmetterlinge auf der Wirtspflanze zur Paarung und anschließenden Eiablage zu sorgen.Stichwörter
Microlepidoptera, Zhejiang Province, Cosmopterigidae, Cosmopterix victor, dancing behavior.A bamboo-feeding species Cosmopterix victor Stringer, 1930 is mentioned from mainland Asia for the first time, with a description and illustration of its very striking dancing behavior. This behavior is regarded as a special adaptation providing the aggregation of adults on the host plants for mating and subsequent oviposition.Keywords
Microlepidoptera, Zhejiang Province, Cosmopterigidae, Cosmopterix victor, dancing behavior
The Ties that Bind: Asian American Communities without \u27\u27Ethnic Spaces in Southeast Michigan
According to the 2000 census, over 12 million Asian Americans, almost 70 percent of them either immigrants who came to the U.S. after 1970 or their children, comprised an ethnically and socioeconomically diverse population that was more regionally dispersed throughout the U.S. than ever before. (Lai and Arguelles, 2003). Despite these transitions and increasing heterogeneity, discourses about Asian American communities have focused on ethnic enclaves such as Chinatowns, Koreatowns, and Little Saigons where coethnic residents, businesses, services, institutions and organizations exist and interact in urban or suburban physical spaces of the bicoastal United States (Fong, 1994; Li, 1999; Zhou and Bankston, 1988). According to Kathleen Wong (Lau), these tangible markers tied to space are often privileged as authentic Asian American communities while those without demographic concentrations and geographically bound enclaves are less advanced communities; as a result, [w]hat is not recognized in the literature is the \u27localness\u27 of this production. [1997:83]
Asset Return Dynamics and Learning
This paper advocates a theory of expectation formation that incorporates many of the central motivations of behavioral finance theory while retaining much of the discipline of the rational expectations approach. We provide a framework in which agents, in an asset pricing model, underparameterize their forecasting model in a spirit similar to Hong, Stein, and Yu (2005) and Barberis, Shleifer, and Vishny (1998), except that the parameters of the forecasting model, and the choice of predictor, are determined jointly in equilibrium. We show that multiple equilibria can exist even if agents choose only models that maximize (risk-adjusted) expected profits. A real-time learning formulation yields endogenous switching between equilibria. We demonstrate that a real-time learning version of the model, calibrated to U.S. stock data, is capable of reproducing many of the salient empirical regularities in excess return dynamics such as under/overreaction, persistence, and volatility clustering.Asset pricing, misspecification, behavioral finance, predictability, adaptive learning
Boston University Wind Ensemble, October 19, 2006
This is the concert program of the Boston University Wind Ensemble performance on Thursday, October 19, 2006 at 8:00 p.m., at the Tsai Performance Center, 685 Commonwealth Avenue, Boston, Massachusetts. Works performed were Festivo by Edward Gregson, Dixtour by Darius Milhaud, New England Triptych by William Schuman, and The Odyssey (Symphony No. 2) by Robert W. Smith. Digitization for Boston University Concert Programs was supported by the Boston University Center for the Humanities Library Endowed Fund
Perspectives on ageing, later life and ethniciy: Ageing research in ethnic minority contexts
This special issue focuses broadly upon questions and themes relating to the current conceptualisations, representations and use of ‘ethnicity’ (and ethnic minority experiences) within the field of social gerontology. An important aim of this special issue is to explore and address the issue of ‘otherness’ within the predominant
existing frameworks for researching those who are ageing or considered aged, compounded by the particular constructions of their ethnicity and ethnic ‘difference’. The range of theoretical, methodological and empirical papers included in this collection provide some critical insights into particular facets of the current research
agendas, cultural understandings and empirical focus of ethnic minority ageing research. The main emphasis is on highlighting the ways in which ethnic cultural homogeneity and ‘otherness’ is often assumed in research involving older people from ethnic minority backgrounds, and how wider societal inequalities are concomitantly
(re)produced, within (and through) research itself – for example, based on narrowly defined research agendas and questions; the assumed age and/or ethnic differences of researchers vis-à -vis their older research participants; the workings of the formalised ethical procedures and frameworks; and the conceptual and theoretical frameworks employed in the formulation of research questions and interpretation of data. We examine and challenge here the simplistic categorisations and distinctions often made in gerontological research based around research participants’ ethnicity, age and ageing and assumed cultural differences. The papers presented in this collection reveal instead the actual complexity and fluidity of these concepts as well as the cultural dynamism and diversity of experiences within ethnic groups. Through an exploration of these issues, we address some of the gaps in existing knowledge and understandings as well as contribute to the newly emerging discussions surrounding the use of particular notions of ethnicity and ethnic minority ageing as these are being employed within the field of ageing studies.This special issue is one of the outcomes from the Economic and Social Research Council (ESRC) seminar series on ‘Ageing, Race and Ethnicity’ (project reference ES/J021547/1),held in the UK during 2012-2014. Open access for this editorial has been provided through the University of Nottingham open access funds
A Dynamic Game of Airline Network Competition: Hub-and-Spoke Networks and Entry Deterrence
In a hub-and-spoke network, the total profit function of an airline is supermodular with respect to its entry decisions at different city-pairs. This source of complementarity implies that a hub-and-spoke network can be an effective strategy to deter entry of competitors. This paper presents a dynamic game of airlines network competition that incorporates this entry deterrence motive for using hub-and-spoke networks. We summarize the results of the estimation of the model, with particular attention to empirical evidence on the entry deterrence motive.Airline networks; Hub-and-spoke; Entry deterrence; Dynamic games; Supermodularity
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