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排序方式: 共有266条查询结果,搜索用时 15 毫秒
1.
Francesco Pauli 《Revue internationale de statistique》2019,87(1):68-79
The reproducibility crisis, that is, the fact that many scientific results are difficult to replicate, pointing to their unreliability or falsehood, is a hot topic in the recent scientific literature, and statistical methodologies, testing procedures and p‐values, in particular, are at the centre of the debate. Assessment of the extent of the problem–the reproducibility rate or the false discovery rate–and the role of contributing factors are still an open problem. Replication experiments, that is, systematic replications of existing results, may offer relevant information on these issues. We propose a statistical model to deal with such information, in particular to estimate the reproducibility rate and the effect of some study characteristics on its reliability. We analyse data from a recent replication experiment in psychology finding a reproducibility rate broadly coherent with other assessments from the same experiment. Our results also confirm the expected role of some contributing factor (unexpectedness of the result and room for bias) while they suggest that the similarity between original study and the replica is not so relevant, thus mitigating some criticism directed to replication experiments. 相似文献
2.
This study examines why most derivatives markets that settle on the day following expiration choose the opening rather than the closing price as the final settlement price (FSP), whereas most markets that settle on the expiration day select an average rather than a single price as the FSP. Four exogenous changes in the Taiwan Futures Exchange settlement procedures provide an experimental basis for studying the settlement procedures’ impact on underlying assets. Greatest market efficiency is observed when the FSP is determined by a single rather than an average price and hypothesize that manipulation is prevented at the expense of market quality. 相似文献
3.
Kyoungsu Kim 《Applied economics letters》2019,26(5):351-357
The price discovery and spillover effect are significant indicators in futures markets. This study examines the price discovery and spillover effects using vector error correction model and generalized autoregressive conditional heteroskedastic for seven types of steel products in Chinese spot and futures markets. The results show that the price discovery exists in all of steel futures market. It is also confirmed that futures prices in all items are mainly leading spot prices via permanent-transitory and information share. In the results of spillover effects, it is found that wire rod, coking coal, coke and silico-manganese have the effects between spot and futures market. In rebar market, there is the spillover effect from spot to futures. This information about futures prices can help the market participants to make decisions when they predict the spot prices. 相似文献
4.
中国期货市场价格发现功能实证研究 总被引:2,自引:0,他引:2
祝合良 《首都经济贸易大学学报》2007,9(2):9-21
从已有的和本文的实证研究结果来看,我国国内期货价格与现货价格之间以及国内外期货价格之间基本上存在着长期均衡关系。从实际情况来看,我国商品生产者与经营者利用期货市场价格信息,发挥期货市场价格发现功能的事例在不断增多。但与期货市场应有的功能相比,我国期货市场的价格发现功能还没有得到应有的发挥。为此,一方面要进一步完善我国期货市场价格形成机制,另一方面要进一步提高我国期货市场价格信息的指导作用和国际市场的定价权。 相似文献
5.
高英杰 《山西财政税务专科学校学报》2007,9(4):73-75
自我认知、自我发现、自我评价、自我悦纳、自我负责、自我发展和自我奉献是完善自我意识的基本心理机制。大学生应当根据自己在成长、成才过程中遇到的实际问题,循序渐进或触类旁通,完善自我意识。 相似文献
6.
Manfen W. Chen Rohan Christie-David William T. Moore 《Journal of Regulatory Economics》2007,31(3):289-312
We hypothesize that the firm’s regulatory environment influences the sensitivity of its equity value to information. Using
intraday stock price data of utilities operating in differing regulatory environments we test for systematic differences between
the responsiveness of stock prices of utility firms operating in deregulated and regulated environments to a common information
set. Our findings reveal sharp differences in responses, with those of utilities operating in deregulated environments the
strongest, and the responses of utilities in highly regulated environments the weakest. While the evidence supports our hypothesis,
in a broader sense, the evidence suggests that deregulation aids in the process of price discovery. We also find evidence
that suggests that deregulation, per se, does not lead to higher stock price volatility.
相似文献
7.
Researching Preferences,Valuation and Hypothetical Bias 总被引:1,自引:0,他引:1
A number of recent papers in environmental economics have focused on the process of researching preferences – agents are uncertain
about preferences but with effort may narrow their uncertainty. This issue has arisen in formulating bids in contingent valuation
(CV) as well as the debate over the divergence between WTP and WTA. In the context of CV, it has been suggested that the hypothetical
nature of the preference elicitation process biases responses. This paper provides both a theoretical model and experimental
evidence to contribute to this debate. The model is a model of competitive bidding for a private good with two components
that are particularly relevant to the debate. The first component is that bidders are unsure of their own value for the private
good but may purchase information about their own value (researching preferences). The second component is that there is a
probability that the auction is hypothetical – that the winning bidder will not get the private good and will not pay the
winning bid. The experiment tests this theoretical model of bidding equilibrium and analyzes the effects of variations in
the parameters (hypotheticalness, information costs and number of agents) on the endogenous variables (such as the proportion
of bidders who become informed and the winning bid). Experimental results suggest that an increase in the hypotheticalness
of an auction tends to decrease the likelihood that bidders pay for information on their valuation with an ambiguous effect
on the winning bid.
相似文献
8.
Using a high-frequency data set of the spot Australian/US dollar, this study examines the distribution of quotes, spreads, and returns across the trading day. By identifying the direction of trade and the subsequent quote returns from contributing banks, the segmented nature of the market into market-makers and informed and uninformed traders is investigated. The results suggest that the economic gain possible from private information is maximised over 2 to 5 quotes and is rapidly eroded by 20 quotes (about 2 min later during busy trading times) as other new information enters the market. Also, the analysis is revealing of discontinuities in trading and the volatility of pricing across the trading day. 相似文献
9.
Hongyan Li 《Journal of Heritage Tourism》2017,12(4):380-393
Archaeological heritage tourism has been critical in historic cultural revival, archaeological knowledge dissemination, environment upgrading, and local community improvement. Little has been undertaken to evaluate the effectiveness and consequences of archaeological heritage projects in China from the tourist perspective. This study of the Daming Palace Heritage Site in Xi’an illustrates how archaeological and cultural resources have contributed to tourists' experiences. Through investigating an array of approaches that have been applied to advance tourists' understanding of archaeological and cultural resources, the paper proposes that more versatile methods and creative works are to be integrated to develop effective interpretative methods for both education and entertainment purposes. Local government needs to change its top-down approach to a more inclusive one, to establish strong networks among state and non-state stakeholders, and to promote their collective involvement in archaeological heritage tourism. Heritage site packaging strategies and partnerships among heritage resources citywide are advocated. More attention should be given to how to integrate various resources of local communities into heritage tourism. The current organization of government-run archaeological heritage in China calls for more opportunities for archaeologists to contribute actively with their expertise to enhance interpretive programmes and general tourist experience. 相似文献
10.
We investigate the behavior of commodity futures risk premia in China. In the presence of retail-dominance and barriers-to-entry, the term structure and momentum premia remain persistent, whereas hedging pressure, skewness, volatility, and liquidity premia are distorted by time-varying margins and strict position limits. Furthermore, open interest, currency, and inflation premia are sensitive to institutional settings. The observed premia cannot be attributed to common risks, sentiment, transactions costs, or data-snooping, but are related to liquidity, anchoring, and regulation-induced limits-to-arbitrage. We highlight the distinctive features of Chinese futures markets and assess the challenges posed to theories of commodity risk premia. 相似文献