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排序方式: 共有236条查询结果,搜索用时 15 毫秒
31.
We build a new class of discrete-time models that are relatively easy to estimate using returns and/or options. The distribution of returns is driven by two factors: dynamic volatility and dynamic jump intensity. Each factor has its own risk premium. The models significantly outperform standard models without jumps when estimated on S&P500 returns. We find very strong support for time-varying jump intensities. Compared to the risk premium on dynamic volatility, the risk premium on the dynamic jump intensity has a much larger impact on option prices. We confirm these findings using joint estimation on returns and large option samples. 相似文献
32.
We formulate a two-period life cycle model of saving, labor supply, and human capital investment when individuals differ in their ability and initial wealth. Borrowing constraints result in sub-optimal choices for consumption and investments in human capital. We analyze optimal linear income taxes and education subsidies. The optimal income tax is shown to be positive—even in the absence of any redistributional concerns. A redistributive income tax relaxes borrowing constraints by redistributing resources from the unconstrained to the borrowing constrained stages of the life cycle. The income tax thus alleviates preexisting non-tax distortions in the capital market. Human capital is subsidized on a net basis in the absence of redistributional concerns. Education subsidies help to relax credit constraints and to reduce distortions from explicit and implicit taxes on human capital formation. When redistributional concerns are present, education is subsidized more if this helps to alleviate distortions on labor supply, but is subsidized less if education subsidies have a very regressive incidence. Simulations demonstrate that optimal income taxes are substantially higher when credit constraints are present. Education is generally subsidized on a net basis, and the more so if credit constraints are more severe. 相似文献
33.
Everett M. Jacobs 《国际广告杂志》2013,32(3):243-246
This paper contrasts Soviet and Western advertising and marketing theory, and explains how Soviet theory has progressed in recent years. Soviet advertising practice has been adversely affected by the central planners' aim of regulating advertising, as well as consumption, so that demand is not stimulated beyond what is thought to be ‘rational’ or desirable. However, without abandoning their traditional product orientation, Soviet marketing theorists are developing the idea that consumer interests should be more important in product development. Moreover, in sharp contrast to previous Soviet practice, market segmentation is being examined as a means to increase the effectiveness of advertising. However, the omission of the important geographical and national group variables from this segmentation strategy implies that political considerations will remain paramount in any changes in theory or practice. 相似文献
34.
Gabriele Jacobs Frank D. Belschak Deanne N. Den Hartog 《Journal of Business Ethics》2014,121(1):63-76
Performance appraisals are widely used as an HR instrument. This study among 332 police officers examines the effects of performance appraisals from a behavioral ethics perspective. A mediation model relating justice perceptions of police officers’ last performance appraisal to their work affect, perceived supervisor and organizational support and, in turn, their ethical (pro-organizational proactive) and unethical (counterproductive) work behavior was tested empirically. The relationship between justice perceptions and both, ethical and unethical behavior was mediated by perceived support and work affect. Hence, a singular yearly performance appraisal was linked to both ethical and unethical behaviors at work. The finding that ethical and unethical aspects of employee behavior share several of the same organizational antecedents, namely organizational justice perceptions, has strong practical implications which are discussed as well. 相似文献
35.
This paper presents an integrative review of the literature on cause-related marketing (CRM) persuasion research (i.e. studies of how CRM influences evaluations of the partner brand). The aim of the study was to review CRM persuasion research and to integrate the findings into a theoretical framework that could direct future research efforts in the area. Drawing on Bergkvist and Taylor's model of Leveraged Marketing Communications (LMC), a dual-path model of CRM persuasion effects was developed. According to the model, CRM affects brand evaluations along two paths: the indirect transfer path which is mediated by attribution of motives and the direct transfer path in which attitude towards the cause is transferred to the brand. The model incorporates results from extant research and provides guidance for future studies. 相似文献
36.
Kris Jacobs 《Journal of Monetary Economics》2007,54(7):2131-2138
We use panel data to estimate nonlinear Euler equations for preferences that are nonseparable in consumption and leisure. This approach departs from existing panel data studies that investigate linearizations and/or separable preferences. Intuitively plausible estimates are obtained only when excluding nonassetholders from the sample, which indicates the importance of asset market participation. For market participants, estimated parameter values are intuitively appealing, but differ from existing estimates. They also differ from parameter values commonly used in computational experiments. These findings have implications for the extensive literature in macroeconomics and finance that studies models of intertemporal decision-making, and they confirm the importance of market incompleteness. 相似文献
37.
38.
Opening, lunch and closing of financial markets induce a periodic component in the volatility of high-frequency returns. We show that price jumps cause a large bias in the classical periodicity estimators and propose robust alternatives. We find that accounting for periodicity greatly improves the accuracy of intraday jump detection methods. It increases the power to detect the relatively small jumps occurring at times for which volatility is periodically low and reduces the number of spurious jump detections at times of periodically high volatility. We use the series of detected jumps to estimate robustly the long memory parameter of the squared EUR/USD, GBP/USD and YEN/USD returns. 相似文献
39.
This paper presents a narrative review of celebrity endorsement research. The review identifies six areas of research on celebrity endorsements (celebrity prevalence, campaign management, financial effects, celebrity persuasion, non-evaluative meaning transfer, and brand-to-celebrity transfer). A review of the research in each area identifies key findings, conflicting results, and research gaps. In addition, this paper reviews the celebrity endorsement literature with a focus on the psychological processes underlying celebrity endorsement effects that has been put forward in the literature. Based on the review an agenda for future research is offered. 相似文献
40.