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   28950篇
  免费   252篇
财政金融   4729篇
工业经济   1668篇
计划管理   4586篇
经济学   6728篇
综合类   615篇
运输经济   96篇
旅游经济   162篇
贸易经济   6221篇
农业经济   547篇
经济概况   3187篇
信息产业经济   45篇
邮电经济   618篇
  2020年   124篇
  2019年   192篇
  2018年   2548篇
  2017年   2360篇
  2016年   1517篇
  2015年   239篇
  2014年   373篇
  2013年   1213篇
  2012年   778篇
  2011年   2352篇
  2010年   2094篇
  2009年   1884篇
  2008年   1813篇
  2007年   2148篇
  2006年   317篇
  2005年   630篇
  2004年   721篇
  2003年   861篇
  2002年   483篇
  2001年   300篇
  2000年   305篇
  1999年   242篇
  1998年   236篇
  1997年   233篇
  1996年   219篇
  1995年   185篇
  1994年   179篇
  1993年   207篇
  1992年   213篇
  1991年   199篇
  1990年   210篇
  1989年   182篇
  1988年   176篇
  1987年   168篇
  1986年   200篇
  1985年   222篇
  1984年   201篇
  1983年   195篇
  1982年   177篇
  1981年   190篇
  1980年   177篇
  1979年   194篇
  1978年   158篇
  1977年   143篇
  1976年   132篇
  1975年   95篇
  1974年   99篇
  1973年   104篇
  1972年   76篇
  1969年   60篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
961.
962.
An increasing number of environmental protection programs offers financial compensation to farmers in exchange for conservation services. Incentive-compatible contracts can be designed to mitigate excess compensation, but the extant literature suggests that outcomes are always second-best so that other instruments (such as conservation auctions) may be preferred. We argue that the claim regarding the first-best solution never being incentive-compatible is correct if all conservation costs are variable in nature; if there are fixed costs too, the first-best compensation scheme may be incentive-compatible after all. Given the relevance of fixed costs in conservation issues, we conclude that incentive-compatible contracts should be given a second chance as a policy measure to induce conservation.  相似文献   
963.
Public disclosure programs that collect and disseminate information about firms’ environmental performance are increasingly popular in both developed and developing countries. Yet little is known about whether they actually improve environmental performance, particularly in the latter setting. We use detailed plant-level survey data to evaluate the impact of India’s Green Rating Project (GRP) on the environmental performance of the country’s largest pulp and paper plants. We find that the GRP drove significant reductions in pollution loadings among dirty plants but not among cleaner ones. This result comports with statistical and anecdotal evaluations of similar disclosure programs. We also find that plants located in wealthier communities were more responsive to GRP ratings, as were single-plant firms.  相似文献   
964.
Established environmental policy theory is based on the assumption of homo economicus. This means that people are seen as fully rational and acting in a self-regarding manner. In line with this, economics emphasizes efficient policy solutions and the associated advantages of price incentives. Behavioral economics offers alternative, more realistic views on individual behavior. In this paper we investigate opportunities to integrate bounded rationality and other-regarding preferences into environmental policy theory to arrive at recommendations for more effective policies. For this purpose, we will address decisions made under risk and uncertainty, intertemporal choice, decision heuristics, other-regarding preferences, heterogeneity, evolutionary selection of behaviors, and the role of happiness. Three aspects of environmental policy are considered in detail, namely sustainable consumption, environmental valuation and policy design. We pay special attention to the role of non-pecuniary, informative instruments and illustrate the implications for climate policy.  相似文献   
965.
Abatement and Allocation in the Pilot Phase of the EU ETS   总被引:1,自引:1,他引:0  
We use historical industrial emissions data to assess the level of abatement and over-allocation that took place across European countries during the pilot phase (2005–2007) of the European Union Emission Trading Scheme. Using a dynamic panel data model, we estimate the counter factual (business-as-usual) emissions scenario for EU member states. Comparing this baseline to allocated and verified emissions, we find that both over-allocation and abatement occurred, along with under-allocation and emissions inflation. Over the three trading years of the pilot phase we find over-allocation of approximately 280 million EUAs and total abatement of 247 Mt CO2. However, we calculate that emissions inflation of approximately 73 Mt CO2 also occurred, possibly due to uncertainty about future policy design features.  相似文献   
966.
In this paper, we give an example in which the price of tradable emission permits increases despite firms’ adoption of less polluting technology, a result that is in contrast with Montero (J Environ Econ 44:23–44, 2002) and Parry (J Regul Econ 14:229–254, 1998), among others. If two Cournot players switch to a cleaner technology, the price for permits may increase due to an increase in the net demand for permits and a decrease in the net supply of permits after the clean technology is adopted. This is only the case when output demand is quite elastic.  相似文献   
967.
This paper formulates a bio-economic model to analyze community incentives for wildlife management under benefit-sharing programs like the Communal Areas Management Programme for Indigenous Resources (CAMPFIRE) in Zimbabwe. Three agents influence the wildlife stock: a parks agency determines hunting quotas, outside poachers hunt illegally, and a local community may choose to protect wildlife by discouraging poaching. Wildlife generates revenues from hunting licenses and tourism; it also intrudes on local agriculture. We consider two benefit-sharing regimes: shares of wildlife tourism rents and shares of hunting licenses. Resource sharing does not necessarily improve community welfare or incentives for wildlife conservation. Results depend on the exact design of the benefit shares, the size of the benefits compared with agricultural losses, and the way in which the parks agency manages hunting quotas.  相似文献   
968.
Heilpflanzenanwendungen in der Altenpflege - In vielen Bereichen der Altenpflege kann auch die Schulmedizin nur begrenzt helfen. Wie gut, dass die Naturheilkunde viele Anwendungsm?glichkeiten bietet, die die Lebensqualit?t der Patienten und Bewohner verbessern k?nnen. Und die Hilfen von Mutter Natur sto?en nicht nur bei Pflegebedürftigen, sondern auch bei den Pflegenden auf positive Resonanz.  相似文献   
969.
Lars Hecht 《Heilberufe》2011,63(6):14-16
Neue Behandlungsm?glichkeiten des Diabetes-Typ-2 - Weltweit ist eine Zunahme der Erkrankungsh?ufigkeit bei Diabetes mellitus zu beobachten. Nach Angaben der International Diabetes Federation (IDF) sind aktuell circa 285 Millionen Menschen betroffen. Hochrechnungen gehen davon aus, dass sich diese Zahl bis zum Jahr 2030 auf 439 Millionen Menschen erh?hen wird.  相似文献   
970.
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