首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   4163篇
  免费   159篇
  国内免费   1篇
财政金融   483篇
工业经济   261篇
计划管理   634篇
经济学   1051篇
综合类   24篇
运输经济   78篇
旅游经济   65篇
贸易经济   909篇
农业经济   151篇
经济概况   663篇
邮电经济   4篇
  2023年   47篇
  2022年   27篇
  2021年   56篇
  2020年   87篇
  2019年   149篇
  2018年   188篇
  2017年   204篇
  2016年   205篇
  2015年   102篇
  2014年   156篇
  2013年   498篇
  2012年   219篇
  2011年   239篇
  2010年   159篇
  2009年   187篇
  2008年   162篇
  2007年   111篇
  2006年   105篇
  2005年   150篇
  2004年   124篇
  2003年   93篇
  2002年   59篇
  2001年   54篇
  2000年   43篇
  1999年   58篇
  1998年   38篇
  1997年   32篇
  1996年   33篇
  1995年   32篇
  1994年   30篇
  1993年   26篇
  1992年   21篇
  1991年   23篇
  1990年   22篇
  1989年   21篇
  1988年   24篇
  1987年   21篇
  1986年   17篇
  1985年   19篇
  1984年   19篇
  1982年   23篇
  1981年   20篇
  1980年   21篇
  1978年   15篇
  1977年   12篇
  1976年   10篇
  1975年   14篇
  1974年   10篇
  1969年   12篇
  1942年   10篇
排序方式: 共有4323条查询结果,搜索用时 15 毫秒
931.
This article explores the differences in unionization rates between migrant and native‐born workers in 23 European countries. It explores whether individual characteristics or contextual factors explain the variation across countries in the degree of trade unions’ inclusion of migrant workers. The analyses show that individual characteristics cannot explain the variation in the difference between migrant and native unionization rates. Characteristics of the industrial relations regime in the country of destination, in particular the institutional embeddedness of trade unions, affect the likelihood that migrants join trade unions as compared to native workers.  相似文献   
932.
Aims: To estimate the cost-effectiveness of a new strategy that uses an amino acid formula in the elimination diet of infants with suspected cow’s milk allergy (CMA).

Materials and methods: This pharmacoeconomic study was developed from the perspective of the Brazilian Public Healthcare System. The new strategy proposes using an amino acid formula in the diagnostic elimination diet of infants (≤24 months) with suspected CMA. The rationale is that infants who do not respond to the amino acid formula do not suffer from CMA. Patients with a positive oral challenge test receive a therapeutic elimination diet based on Brazilian Food Allergy Guidelines. This approach was compared to the current recommendations of the Brazilian Food Allergy Guidelines. A decision model was constructed using TreeAge Pro 2012 software. Model inputs were based on a literature review and the opinions of a panel of experts. A univariate sensitivity analysis of incremental cost-effectiveness ratios was performed.

Results: The mean cost per patient of the new amino acid formula strategy was R$3,341.57, while the cost of the current Brazilian guidelines strategy was R$3,641.08. The mean number of symptom-free days per patient, which was used as an indicator of effectiveness, was 900.6 and 875.7 days, respectively. The new strategy is, therefore, dominant. In the sensitivity analysis, the dominance was maintained with parameter variation.

Limitations: In the absence of information in the literature, some premises were defined by a panel of specialists.

Conclusions: The new strategy, which uses an amino acid formula in the elimination diagnostic diet followed by an oral food challenge, is a dominant pharmacoeconomic approach that has a lower cost and results in an increased number of symptom-free days.  相似文献   

933.
In his debate with Bertil Ohlin, Keynes observed that entrepreneurs, when deciding to invest, have to be sure they will access the amount of finance necessary to initiate the investment process and that they will be able, when the time comes, to fund their debts in ways that are adequate to the profile of assets they are purchasing. In this statement, Keynes outlines the functions of financial systems in Entrepreneurial Economies, the type of economies he hypothesizes we live in. In entrepreneurial economies, investing firms have to be able to get hold of the necessary amount of means of payment required to purchase or order investment goods and to build balance sheets where in- and outflows of cash are broadly matched within reasonable margins of safety. This means that financial systems’ primary role in Keynesian economics is not to allocate savings or capital but to allocate liquidity and to allow investors to build liquid balance sheets. The article develops this proposition, presenting Keynes's basic concepts on the matter and showing how modern financial systems perform their role.  相似文献   
934.
935.
936.
The present research examined the possibility that subtle face‐like features (a smile‐ or a frown‐like line) on a product can influence evaluations of and preferences for that product. The same within‐participants experiment was conducted twice, once in the United Kingdom and once in Colombia: participants viewed four variants (concave [smile‐like] line, convex [frown‐like] line, straight line, line absent) of three different products (tea, shampoo, juice) and both evaluated the products on visual analogue scales and completed a forced choice decision task. The results revealed a general tendency across scales, products, and countries for the participants to rate products more positively and to choose products more frequently when they displayed a concave line relative to a convex line; comparisons with the straight line and absent line conditions suggested that the effects were present for both concave and convex lines, but were stronger in the concave instance. These findings provide both a deeper theoretical understanding of the influence of subtle cues on evaluation and decision making, and concrete, practical information for both product designers and marketers.  相似文献   
937.
The “gift exchange theory” articulated by Marcel Mauss, along with his core concept of a threefold obligation (giving/receiving/returning), is the dominant theoretical framework used to explain the majority of gift issues in marketing. This perspective assumes that some interest always lies behind gifts, such that a gift always implies a counterpart of receiving something in return. Despite the relevance of this approach in understanding the day-to-day consumer behavior, this paper presents empirical cases where the consumer is also able to give freely, that is to say without implying a counterpart or even expecting it. To explain those empirical cases, we mobilize a key teaching of the Catholic Church: the “gratuitous gift” and then introduce the concept of the “need to give.” We show that gratuitousness is a relevant concept to understand most of gifts made by consumers, and we develop the normative aspect of gratuitous gift for ethical marketers (i.e., what ethical marketers should consider to understand consumers properly and in a more humanistic way). We also show that Catholic Social Teaching offers an appropriate anthropology to understand consumer behaviors motivated by this need for gratuitousness. To conclude, we propose further avenues of research.  相似文献   
938.
This research investigates the key elements that South African financial services firms consider before making foreign direct investments in Sub-Saharan African (SSA) markets. The results show that South African financial services firms are most strongly influenced by the political and economic stability of the country in question as well as the profitability and long-term sustainability of its specific markets. The degree of available infrastructure in terms of Information and Communication Technology as well as the existence of credible financial systems was also viewed as highly important considerations before investing in SSA. Given the uncertainty and ambiguity of most SSA markets many South African financial services firms prefer to enter existing markets via a majority stakeholder joint venture with a local partner or via a new investment if the market does not currently exist. The nature of the financial services firm also seems to influence the entry method and once in a new country most firms seem to prefer a full service presence. Additionally, the key motives cited for expansion northward were to broaden revenue bases and improve profit margins as well as to stay close to local customers.  相似文献   
939.
We analyze an equilibrium labor market with on‐the‐job search and experience effects (as workers learn by doing). The analysis yields a Mincer wage equation with worker fixed effects and endogenously determined firm fixed effects. Equilibrium sorting—where over time more experienced workers also tend to move to better paid employment—has a significant impact on wage inequality.  相似文献   
940.
Hard-discounters (HDs) such as Aldi and Lidl are increasingly introducing national brands (NBs) into their private label (PL) dominated assortments. While there is evidence that this enhances sales in the categories where such NBs are added, little is known about how it affects consumers' overall perceptions of the HD and consequently its share of the customers' wallet. Using a unique data set that combines longitudinal information on a HD's perceptions, with that chain's assortment composition, we investigate the impact of NB introductions on the chain's overall value and assortment image, and spending share.We show that introductions of NBs, in particular category leaders, may significantly contribute to a more favorable perception of the HD store. For positive value-image effects to materialize, HDs must offer these NBs at low-enough prices to maintain a reasonable price gap with the current private label offer. For the NB entry to enhance the HD's assortment perception, it must come with a sufficiently deep product line.However, there are limits to this approach. Introductions gradually lose effect as the share of NBs at the HD goes up. More importantly, ill-selected NB additions may backfire on the HD. Listing NBs that are not category-leaders, at prices too far above its private labels, deteriorates the HD's favorable value positioning — cutting into its core competitive advantage, and leading to notable reductions in share-of-wallet. We discuss the academic and managerial implications of these findings.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号