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Warren Webb 《电子经理世界》2006,(3):35
尽管嵌入式软件由世界各地众多OEM设计者制造,但大多数的支持却由少量的软件供应商提供,他们供应操作系统、开发工具和通用开发环境,比如安全和通讯环境。 相似文献
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As marketers attempt to place advertisements based on demographic profiles, the use of psychographic information becomes more important. The purpose of this research is to evaluate the validity of selected psychographic measures as well as to then relate these constructs to demographic segments. The analysis, using LISREL VI, assesses the constructs, which then, based on MANOV, are related to demographic segments. Implications of the study for validating psychographic measures and for applying this knowledge are discussed. © 1995 John Wiley & Sons, Inc. 相似文献
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Six of the simpler ARMA type models are examined with respect to properties of a variety of proposed estimators of unknown parameters. The findings suggest that if only one estimation method were available to a researcher the choice should probably be maximum likelihood. Stationarity- and invertibility-restricted estimation would appear appropriate when parameters are thought to be within 5 percent of constraint boundaries. 相似文献
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This paper considers the problem of accounting for employee entitlements. Accrued entitlements to annual leave, sick leave and long service leave are evaluated by reference to the basic characteristics of an accounting liability and a case is presented for liability recognition in each instance. An empirical survey undertaken by the authors shows current practice in this area and indicates the need for improved financial reporting. 相似文献
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Warren T. Dent 《Journal of econometrics》1980,12(1):49-58
Efficient estimation of models under linear restrictions on parameters has received little attention. We present a unified approach which takes account of both full rank and less than full rank design and constraint matrices. The procedure is numerically fast, accurate, and space efficient. An example is included. 相似文献
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Behavioral biases of mutual fund investors 总被引:1,自引:0,他引:1
We examine the effect of behavioral biases on the mutual fund choices of a large sample of US discount brokerage investors using new measures of attention to news, tax awareness, and fund-level familiarity bias, in addition to behavioral and demographic characteristics of earlier studies. Behaviorally biased investors typically make poor decisions about fund style and expenses, trading frequency, and timing, resulting in poor performance. Furthermore, trend chasing appears related to behavioral biases, rather than to rationally inferring managerial skill from past performance. Factor analysis suggests that biased investors often conform to stereotypes that can be characterized as Gambler, Smart, Overconfident, Narrow Framer, and Mature. 相似文献