全文获取类型
收费全文 | 90篇 |
免费 | 2篇 |
专业分类
财政金融 | 22篇 |
工业经济 | 6篇 |
计划管理 | 15篇 |
经济学 | 12篇 |
运输经济 | 1篇 |
贸易经济 | 28篇 |
经济概况 | 4篇 |
邮电经济 | 4篇 |
出版年
2023年 | 1篇 |
2022年 | 1篇 |
2020年 | 1篇 |
2019年 | 1篇 |
2018年 | 4篇 |
2017年 | 5篇 |
2016年 | 2篇 |
2014年 | 3篇 |
2013年 | 9篇 |
2012年 | 4篇 |
2011年 | 7篇 |
2010年 | 4篇 |
2009年 | 2篇 |
2008年 | 3篇 |
2007年 | 2篇 |
2006年 | 2篇 |
2004年 | 5篇 |
2003年 | 2篇 |
2002年 | 1篇 |
2001年 | 6篇 |
2000年 | 2篇 |
1999年 | 1篇 |
1998年 | 3篇 |
1997年 | 2篇 |
1996年 | 1篇 |
1995年 | 5篇 |
1994年 | 2篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1985年 | 2篇 |
1982年 | 1篇 |
1980年 | 1篇 |
1978年 | 1篇 |
1973年 | 1篇 |
1971年 | 1篇 |
1967年 | 1篇 |
1966年 | 1篇 |
排序方式: 共有92条查询结果,搜索用时 15 毫秒
31.
Die Zuwanderung von hochqualifizierten Arbeitskr?ften wird von Unternehmern, Politikern und Wissenschaftlern gewünscht. Welche
Position nimmt Deutschland im internationalen Wettbewerb um die „hellsten K?pfe“ ein? Welche Steuerungswirkungen hatte die
deutsche Zuwanderungspolitik in der Vergangenheit? Wie wirkt die gegenw?rtige Politik auf die Arbeitsmigration? 相似文献
32.
In this paper we introduce a new approach to the calculation of claims reserves (known and IBNR cases) which is particularly adapted to the business model of legal expense insurance. An essential aspect here is the split into two model components: case numbers and average claim costs. In contrast to other reserving methods for case numbers and claims cash flows which are frequently used in practice without checking the validity for application we introduce a model in which the time until case settlement is described by a lifetime distribution according to the principles of life insurance. The split of model components also allows for a simple implementation of cost inflation effects which is required by German law. Finally, the approach proposed here can readily be transferred to the calculation of IBNR reserves. 相似文献
33.
Chiara Orsi Cristina Montomoli Dietmar Otte Anna Morandi 《International journal of injury control and safety promotion》2017,24(4):534-543
This study analyzed the most common types of accident involving bicycles and compared the frequency of injuries. The data source was the database of German In-Depth Accident Study (GIDAS). Cases consist of bicycles and their riders involved in accidents between 2000 and 2010. In most collisions, the bicycle impacted with a car. The percentage of injured bicyclists was higher in collisions with a heavy vehicle and decreased when the bicycle impacted with lighter vehicles. A high percentage of injured bicyclists in single accidents was observed; the most severe injury was more frequently to head and extremities. Accidents involving a car and a bicycle with the right of way in a bicycle path represented about 20% of involved and injured bicyclists. The ten most frequent configurations represented about 60% of involved and injured bicyclists. These results contribute to understand the dangerous scenarios for bicyclists and to suggest preventive actions. 相似文献
34.
35.
Alfonso Gambardella Dietmar Harhoff Bart Verspagen 《Journal of Economics & Management Strategy》2017,26(4):735-756
Patent holders may choose to protect innovations with single patents or to develop portfolios of multiple, related patents. We propose a decision‐making model in which patent holders allocate resources to either expanding the number of related patents or investing in higher value of patents in the portfolio. We estimate the derived value equation using portfolio value data from an inventor survey at the level of individual inventions rather than the firm as a whole. We find that investments in individual inventions exhibit diminishing returns, and that a good part of the value of a portfolio depends on adding new patented inventions. Also, while diminishing returns to individual inventions are stable across subsamples, the returns to portfolio size vary between complex and discrete industries, and between inventions that are science‐based or driven by customer information. When firms seek to strengthen appropriability, the returns to an increase of portfolio size are not different from the sample average. Thus, a higher number of inventions in a portfolio may reflect both stronger appropriability via patents and genuine creation of value. 相似文献
36.
Dietmar Hegeholz 《Heilberufe》2009,61(3):11-14
Stuhlinkontinenz und Obstipation - Im Pflegealltag stellen Darmfunktionsst?rungen eine Herausforderung dar: Denn die Versorgung
des stuhlinkontinenten Patienten bedeutet einen immensen Zeitaufwand und die chronische Obstipation erscheint als Wohlstandskrankheit,
die trotz intensiver Bemühungen nur teilweise beherrscht werden kann. 相似文献
37.
Hans-Jürgen Busse J. B. Donges Dietmar Haubold Torsten Tewes 《Review of World Economics》1973,109(2):A64-A71
Ohne Zusammenfassung 相似文献
38.
The availability of renewable energies differs significantly across European regions. Consequently, European cooperation in the deployment of renewable energy potentially yields substantial efficiency gains. However, for achieving the 2020 renewable energy targets, most countries purely rely on domestic production. In this paper, we analyze the benefits of cooperation compared to continuing with national renewable energy support after 2020. We use an optimization model of the European electricity system and find that compared to a 2030 CO2-only target (?40 % compared to 1990), electricity system costs increase by 5 to 7 % when a European-wide renewable energy target for electricity generation (of 55 %) is additionally implemented. However, these additional costs are 41 to 45 % lower than the additional costs which would arise if the renewable energy target was reached through national support schemes (without cooperation). Furthermore, the cost reduction achieved by cooperation is quite robust with regard to assumptions about interconnector extensions and investment cost developments of renewable energy technologies. In practice, however, administrative issues and questions concerning the fair sharing of costs and benefits between the Member States represent major obstacles that need to be tackled in order to reach renewable energy targets at the lowest costs possible. 相似文献
39.
40.
Marketing Letters - There is little research on how consumers decide whether they want to use algorithmic advice or not. In this research, we show that consumers’ lay beliefs about artificial... 相似文献