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1.
Recently, German insurers are becoming increasingly interested in assessing and modelling risks related to new business and lapses. The final report of a DAV (German actuarial association) working party on stochastic models for German life insurance companies, released end of 2005, includes some basic approaches for this purpose. However, so far no systematic empirical research has been carried out which provides evidence for an appropriate calibration of such models. This article contributes to closing the gap. It presents the main results of an empirical analysis on the influence of policyholders’ profit participation on new business and lapses based on data about 87 German life insurance companies from 1995—2004. Analyses of regression and correlation were performed for various definitions of the explanatory variable ?profit participation“ (more precisely: the spread to some average value) and with diverse reference parameters for new business and lapses, also considering different types of life insurance. Ultimately, the exploration scarcely yielded evidence for a significant general correlation between policyholders’ profit participation and new business or lapses. However, because of the individuality of life insurance business such an evaluation of historical data can certainly only be regarded as a building block for the overall picture, as is also explained in the paper in some more detail. 相似文献
2.
Ines Engelmann M.A. 《Publizistik》2009,54(1):82-102
While framing theory is concerned with the way media content is presented, news bias theory concentrates on the evaluative aspect. The study integrates both approaches of news structuring. A detailed argument analysis of two German quality newspapers, Die Welt and Frankfurter Rundschau, representative for two opposite editorial viewpoints, was conducted to test the assumptions of both theories. The examination of news coverage related to the accession of Poland, Czech Republic, Bulgaria and Romania to the EU contradicts previous results of framing and news bias research. Apart from finding a pronounced focus on economical topics in both newspapers, they clearly differ in their frames of reference and political positions on the issues, staying in line with their editorial orientation. A comparison of the different accession times reveals a change in the frames of reference and the advocates of these frames. 相似文献
3.
The purpose of this paper is to show the varying effects of alliance portfolio size and heterogeneity on innovation in biotechnology firms. Previous literature has indicated that the number and heterogeneity of partners in an alliance portfolio might have positive effects on innovativeness. Yet, engaging in multiple and heterogeneous collaborations also raises managerial costs and complexity levels disproportionally, potentially causing detrimental performance effects. Analysis of a unique panel dataset suggests that engaging in many alliances generally has a positive influence on a firm’s innovation output. Furthermore, maintaining diverse alliance portfolios and a high extent of alliancing jointly affects a firm’s innovation output ?negatively. By additionally showing that younger firms benefit disproportionally from both alliance portfolio diversity and size, this study provides a more nuanced view of alliancing effects. 相似文献
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Auditing Quality of Research in Social Sciences 总被引:2,自引:0,他引:2
Sanne Akkerman Wilfried Admiraal Mieke Brekelmans Heinze Oost 《Quality and Quantity》2008,42(2):257-274
A growing body of studies involves complex research processes facing many interpretations and iterations during the analyses.
Complex research generally has an explorative in-depth qualitative nature. Because these studies rely less on standardized
procedures of data gathering and analysis, it is often not clear how quality was insured or assured. However, one can not
easily find techniques that are suitable for such complex research processes to assess the quality of the study. In this paper,
we discuss and present a suitable validation procedure. We first discuss how ‘diagnosing’ quality involves three generic criteria.
Next, we present findings of previous research in possible procedures to assure the quality of research in social sciences.
We introduce the audit procedure designed by Halpern [(1983) Auditing Naturalistic Inquiries: The Development and Application of a Model. Unpublished doctoral dissertation, Indiana University] we found an appropriate starting point for a suitable procedure for
quality judgment. Subsequently, we will present a redesign of the original procedure, with according guidelines for the researcher
(the auditee) and for the evaluator of the quality of the study (the auditor). With that design, we aim to enable researchers
to bring forward their explorative qualitative studies as stronger and more equally valuable to studies that can rely on standardized
procedures. 相似文献
8.
We derive a quantity‐based structural gravity equation system in which both trade flows and error terms are cross‐sectionally correlated. This system can be estimated using techniques borrowed from the spatial econometrics literature. To illustrate our methodology, we apply it to a well‐known Canada–US trade dataset. We find that border effects between the USA and Canada are smaller than suggested by previous studies: about 7.5 for Canadian provinces and about 1.3 for US states. Hence controlling directly for cross‐sectional interdependence among both trade flows and error terms reduces measured border effects by capturing ‘multilateral resistance’. Copyright © 2010 John Wiley & Sons, Ltd. 相似文献
9.
Wilfried Lütkenhorst 《Intereconomics》1989,24(3):127-137
Industrial technologies are both an outcome of the industrialization process and one of its main driving forces. The introduction
of new technologies can be seen as one of several important factors which directly and indirectly change the context and modes
of international industrial production, thus being among the key determinants of the international division of labour. Given
the accelerating pace of technological development in industry, there is an urgent need not only to identify incipient technological
breakthroughs but above all, at an early stage, to analyze their short-and long-term implications for the worldwide industrialization
process and to reassess the validity of crucial assumptions underlying developing countries’ current industrial strategies.
The views expressed in this article are those of the author and do not necessarily reflect the views of the UNIDO Secretariat. 相似文献
10.
Wilfried R. Vanhonacker 《Marketing Letters》1990,1(2):125-137
In estimating response models using secondary data, it can happen that the observations on the variables are subject to different temporal aggregation. Estimating a dynamic model with this type of data is not straightforward, particularly when (a) estimates with good statistical properties are desired, and (b) full use of all information in the data is needed. This paper provides an overview and discussion of the various approaches to the estimation problem when independent variables are observed less frequently than the dependent variable. The superiority of one-step estimation procedures that simultaneously estimate the parameters and the missing disaggregated data points is established.Insead 相似文献