全文获取类型
收费全文 | 17607篇 |
免费 | 42篇 |
专业分类
财政金融 | 2784篇 |
工业经济 | 817篇 |
计划管理 | 2742篇 |
经济学 | 4167篇 |
综合类 | 482篇 |
运输经济 | 13篇 |
旅游经济 | 6篇 |
贸易经济 | 4601篇 |
农业经济 | 21篇 |
经济概况 | 1393篇 |
信息产业经济 | 44篇 |
邮电经济 | 579篇 |
出版年
2024年 | 2篇 |
2023年 | 17篇 |
2022年 | 7篇 |
2021年 | 17篇 |
2020年 | 44篇 |
2019年 | 64篇 |
2018年 | 2341篇 |
2017年 | 2083篇 |
2016年 | 1256篇 |
2015年 | 115篇 |
2014年 | 137篇 |
2013年 | 145篇 |
2012年 | 497篇 |
2011年 | 1990篇 |
2010年 | 1863篇 |
2009年 | 1560篇 |
2008年 | 1550篇 |
2007年 | 1891篇 |
2006年 | 101篇 |
2005年 | 419篇 |
2004年 | 485篇 |
2003年 | 571篇 |
2002年 | 271篇 |
2001年 | 71篇 |
2000年 | 60篇 |
1999年 | 7篇 |
1998年 | 27篇 |
1997年 | 4篇 |
1996年 | 22篇 |
1995年 | 1篇 |
1994年 | 3篇 |
1993年 | 2篇 |
1992年 | 2篇 |
1991年 | 2篇 |
1986年 | 14篇 |
1985年 | 3篇 |
1984年 | 1篇 |
1980年 | 1篇 |
1979年 | 1篇 |
1932年 | 1篇 |
1930年 | 1篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
941.
Robin Naidoo Greg Stuart-Hill L. Chris Weaver Jo Tagg Anna Davis Andee Davidson 《Environmental and Resource Economics》2011,48(2):321-335
There exist few quantitative assessments of the relationship between biodiversity per se and economic benefits at scales that are relevant for conservation. Similarly, the merits of Community-Based Natural Resource
Management programs for both wildlife and people are contested. Here, we harness two databases, on wildlife surveys and financial
benefits, to address these issues for communal conservancies in northwest Namibia. We use ordination methods to characterize
the diversity and stability of large wildlife assemblages on conservancies, and demonstrate that diversity (but not stability)
is an important explanator of conservancy financial benefits. Our results indicate that for this area of Namibia, biodiversity,
as represented by large wildlife assemblages, has an important, positive effect on the tangible financial benefits that people
derive from conservation programs. 相似文献
942.
The marked increase in the availability of spatial data has forced researchers engaged in land use modeling to directly confront
the question of space and the theoretical and methodological challenges involved in developing spatial models. Advances have
come from multiple disciplines, most notably through the development and application of spatial theory and methods from regional
science, geography, urban economics and more recently, theoretical and applied econometrics. The main goal of this paper is
to summarize the econometric challenges of spatial data and to highlight spatial models and methods with a particular focus
on models of land markets and land use change. We also discuss the data and modeling challenges associated with modeling the
underlying spatial economic mechanisms that give rise to land use patterns and the complexities involved in modeling land
use as a coupled economic-ecological system. 相似文献
943.
The Baltimore Gas and Electric Company (BGE) undertook a dynamic pricing experiment to test customer price responsiveness
to different dynamic pricing options. The pilot ran during the summers of 2008 and 2009 and was called the Smart Energy Pricing (SEP) Pilot. In 2008, it tested two types of dynamic pricing tariffs: critical peak pricing (CPP) and peak time rebate (PTR) tariffs.
About a thousand customers were randomly placed on these tariffs and some of them were paired with one of two enabling technologies,
a device known as the Energy Orb and a switch for cycling central air conditioners. The usage of a randomly chosen control
group of customers was also monitored during the same time period. In 2009, BGE repeated the pilot program with the same customers
who participated in the 2008 pilot, but this time it only tested the PTR tariff. In this paper, we estimate a constant elasticity
of substitution (CES) model on the SEP pilot’s hourly consumption, pricing and weather data. We derive substitution and daily
price elasticities and predictive equations for estimating the magnitude of demand response under a variety of dynamic prices.
We also test for the persistence of impacts across the two summers. In addition, we report average peak demand reduction for
each of the treatment cells in the SEP pilot and compare the findings with those reported from earlier pilots. These results
show conclusively that it is possible to incentivize customers to reduce their peak period loads using price signals. More
importantly, these reductions do not wear off when the pricing plans are implemented over two consecutive summers. Our analyses
reveal that SEP participants reduced their peak usages in the range of 18 to 33% in the first summer of the SEP pilot and
continued these reductions in the second summer. 相似文献
944.
Invasive animal pests reduce crop and livestock output, require management and control measures, and threaten native plants,
animals and their habitat. The agricultural and management costs are often directly measurable. But the costs to protect threatened
native plants and animals are harder to assess. The Rural Lands Protection Boards were the government agency in New South
Wales that managed invasive animals. An analysis of their decisions provided the opportunity to estimate the costs of protecting
native species. The number of native plants and animals threatened by invasive pests was modelled against the expenditure,
area, pest abundance, climate and location of 38 Board districts. There was a strong negative relationship between the number
of threatened native species and Board expenditure. This relationship was interpreted to estimate the marginal cost of protecting
a threatened native species, the downward shift in the supply curve necessary to protect all threatened native species, and
the gains from the shift in the form of cost savings in the continued protection of non-threatened native species. These results
value some of the costs that invasive animal pests impose on the environment. 相似文献
945.
946.
Thijs Dekker Roy Brouwer Marjan Hofkes Klaus Moeltner 《Environmental and Resource Economics》2011,49(4):597-624
This paper presents the first value of statistical life (VSL) meta-analysis that empirically estimates correction factors
for ‘out of context’ benefits transfer (BT) purposes. In the field of mortality risk reductions elicited willingness to pay
values in one risk context, say road safety, are frequently applied in other risk contexts like air pollution. However, differences
in risk perception and the population at risk across contexts are likely to result in diverging VSL estimates. In a meta-analysis
of 26 international stated preference studies, a Bayesian model is estimated regressing contingent values for mortality risk
reductions, originating from three different risk contexts, on the characteristics of the risk reduction itself and additional
variables characterizing the underlying studies. A willingness to pay (WTP) premium for mortality risk reductions in the air
pollution and general mortality risk context relative to improving road safety is observed. Evaluated at the mean, road safety
VSL estimates should be multiplied by a factor 1.8 before being applicable in the air pollution context. Moreover, in an illustrative
BT exercise we find limited overlap in the set of context specific predictive VSL distributions. Consequently, ‘out of context’
BT results in a substantial over- or underestimation of the VSL. 相似文献
947.
Nicholas Powers Allen Blackman Thomas P. Lyon Urvashi Narain 《Environmental and Resource Economics》2011,50(1):131-155
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
948.
Elisabeth Gsottbauer Jeroen C. J. M. van den Bergh 《Environmental and Resource Economics》2011,49(2):263-304
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
949.
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
950.
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