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1.
本文首先从理论上深刻剖析了房地产泡沫与银行信贷规模相互之间的作用与传导机制,在此基础上选取2006年—2018年相关指标的年度数据,对房地产泡沫与银行信贷规模进行了图形拟合与周期性波动规律分析,分析发现二者存在极高的契合度.建立房地产泡沫的函数,构建协整方程实证发现银行信贷规模对房地产泡沫的长期弹性系数为0.51,从长... 相似文献
2.
Petri Rouvinen 《Economics of Innovation and New Technology》2013,22(6):525-541
This is a study of the effects of R&D spillovers on the cost and production structures of Finnish manufacturing firms. Confidential data on firms is used to estimate a translog cost function system with random coefficients. Although the results suggest that intra-industry spillovers are present in Finnish manufacturing, the findings regarding inter-industry spillovers are inconclusive. The variable cost reduction associated with spillovers is positive, but relatively low. Spillovers reduce the demand for labor but increase the demand for materials. Spillovers also reduce the willingness to pay for capital inputs. 相似文献
3.
Harry Zheng 《Quantitative Finance》2013,13(3):399-405
We propose a copula contagion mixture model for correlated default times. The model includes the well-known factor, copula, and contagion models as its special cases. The key advantage of such a model is that we can study the interaction of different models and their pricing impact. Specifically, we model the default times of the underlying names in a reference portfolio to follow contagion intensity processes with exponential decay coupled with a copula dependence structure. We also model the default time of the counterparty and its dependence structure with the reference portfolio. Numerical tests show that correlation and contagion have an enormous joint impact on the rates of CDO tranches and the corresponding credit value adjustments are extremely high to compensate for the wrong-way risk. 相似文献
4.
离差策略是一种对冲交易策略,它是利用股指期权和一揽子股票期权(或部分成分股构成的ETF期权)之间的隐含相关系数,获悉市场成分股期权和股指期权波动率高低的相对关系,再在成分股期权和股指期权建立相反的头寸。离差交易策略选择暴露的风险因子就是隐含相关系数,离差交易使用的是对冲的平价跨式期权交易。选用2006年5月18日至2014年7月17日前复权的沪深300股指、上证50指数和上证180指数作为样本,进行实证检验。虽然结果显著性较强,但不排除存在模型不稳定性以及由于数据不充分造成对相关系数及波动率估计的偏误。同时,离差交易使用的是对冲的平价跨式期权交易,所以组合暴露较小的Delta风险。若离差交易涉及较大的资金量时,则需要用标的资产对组合进行动态Delta中性对冲。 相似文献
5.
企业社会责任与财务绩效的关联性是国内外研究的一个热点问题。论文运用文献研究法对国内外企业社会责任与财务绩效相关研究进行了详细梳理,对二者相关性的研究结论进行了分类总结;同时分析了企业社会责任与财务绩效关联性研究结论不一致的原因,并为后续研究提出了建议。 相似文献
6.
矿井素质是一个表现煤矿企业发展现状及潜力的综合指标,矿井素质评价对企业的健康持续发展有重要意义。本文对影响矿井素质的因素进行了灰色关联分析,从灰色系统理论的角度对矿井素质进行评价,得出符合实际的评价结果,并通过对结果的分析,对煤矿企业管理提出改进意见。 相似文献
7.
John Aldrich 《Revue internationale de statistique》1998,66(1):61-81
Gauss introduced a procedure for calculating least squares estimates and their precisions. Yule introduced a new system of notation adapted to correlation analysis. This paper describes these formalisms and compares them with the matrix and vector space formalisms used in modern regression analysis. 相似文献
8.
《International Journal of Forecasting》2023,39(2):981-991
Deterministic forecasts (as opposed to ensemble or probabilistic forecasts) issued by numerical weather prediction (NWP) models require post-processing. Such corrective procedure can be viewed as a form of calibration. It is well known that, based on different objective functions, e.g., minimizing the mean square error or the mean absolute error, the calibrated forecasts have different impacts on verification. In this regard, this paper investigates how a calibration directive can affect various aspects of forecast quality outlined in the Murphy–Winkler distribution-oriented verification framework. It is argued that the correlation coefficient is the best measure for the potential performance of NWP forecast verification when linear calibration is involved, because (1) it is not affected by the directive of linear calibration, (2) it can be used to compute the skill score of the linearly calibrated forecasts, and (3) it can avoid the potential deficiency of using squared error to rank forecasts. Since no single error metric can fully represent all aspects of forecast quality, forecasters need to understand the trade-offs between different calibration strategies. To echo the increasing need to bridge atmospheric sciences, renewable energy engineering, and power system engineering, as to move toward the grand goal of carbon neutrality, this paper first provides a brief introduction to solar forecasting, and then revolves its discussion around a solar forecasting case study, such that the readers of this journal can gain further understanding on the subject and thus potentially contribute to it. 相似文献
9.
对外直接投资与美国服务贸易的发展 总被引:1,自引:0,他引:1
一般认为,对外直接投资活动(FDI)对贸易的持续增长将起到十分重要的支撑和推动作用。本文选用了美国1970年至2003年的相关数据,通过建立自回归模型,拟合后发现这个结论在美国的服务业领域也成立。进一步运用Granger因果检验方法,发现两者之间还存在着互为因果的关系。然而,通过对统计数据的分析,同时也直观地发现,在美国服务业内的对外直接投资与对外贸易在进出口上的同向相关性并不明显。其原因可能是各国对服务业的限制措施所造成的扭曲和直接投资的贸易替代效应所致。 相似文献
10.
《Journal of Property Research》2012,29(3):249-257
Given a large sample of properties with time series returns extending over a number of periods it can be shown that the average cross correlation coefficient between the properties increases with the reporting interval. This paper offers an explanation for why this phenomenon exists and shows that, in addition to the contemporaneous cross correlation, the impact of serial cross correlation plays an important role. By contrast, smoothing has little impact. It is further shown that at the portfolio level the distribution of cross correlation coefficients is positively skewed for monthly returns. As the reporting interval increases the distribution becomes more normal. This has important implications at two levels. First, behavioural effects are likely to be more pervasive at the monthly level so that a large proportion of monthly valued properties will exhibit high serial cross correlation. Second, high serial cross correlation will induce high serial correlation in an index of returns. As the reporting interval increases this effect diminishes 相似文献