全文获取类型
收费全文 | 669篇 |
免费 | 14篇 |
国内免费 | 2篇 |
专业分类
财政金融 | 177篇 |
工业经济 | 12篇 |
计划管理 | 240篇 |
经济学 | 111篇 |
综合类 | 23篇 |
运输经济 | 13篇 |
旅游经济 | 5篇 |
贸易经济 | 57篇 |
农业经济 | 22篇 |
经济概况 | 25篇 |
出版年
2024年 | 2篇 |
2023年 | 11篇 |
2022年 | 11篇 |
2021年 | 13篇 |
2020年 | 23篇 |
2019年 | 34篇 |
2018年 | 19篇 |
2017年 | 28篇 |
2016年 | 28篇 |
2015年 | 17篇 |
2014年 | 37篇 |
2013年 | 91篇 |
2012年 | 24篇 |
2011年 | 35篇 |
2010年 | 25篇 |
2009年 | 48篇 |
2008年 | 33篇 |
2007年 | 30篇 |
2006年 | 29篇 |
2005年 | 23篇 |
2004年 | 17篇 |
2003年 | 18篇 |
2002年 | 14篇 |
2001年 | 13篇 |
2000年 | 14篇 |
1999年 | 10篇 |
1998年 | 8篇 |
1997年 | 3篇 |
1996年 | 5篇 |
1995年 | 4篇 |
1994年 | 2篇 |
1993年 | 3篇 |
1992年 | 1篇 |
1991年 | 3篇 |
1990年 | 2篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1987年 | 1篇 |
1986年 | 2篇 |
1984年 | 1篇 |
1982年 | 1篇 |
排序方式: 共有685条查询结果,搜索用时 0 毫秒
111.
RSB-CWS算法结合了蒙特卡洛模拟和CWS节省算法,利用蒙特卡洛模拟对CWS算法节省列表中顾客对间的边进行模拟,模拟过程中采用基于类几何分布的直接抽样方法进行路径采样。对模拟得到的边序列应用CWS算法,所得解的质量能达到或者优于当前最优解.与其他CVRP问题算法相比具有高效、高质量的特点,且可以解决规模较大的CVRP问题。 相似文献
112.
113.
文章以2001-2012年省级面板数据为基础,利用可行的广义最小二乘法(FGLS),对影响我国养老保险待遇水平的因素进行了定量研究。研究表明:在职职工年人均缴费额、职退比、人均GDP、人均财政收入对我国养老保险待遇水平有显著的正向影响,城市化率对养老保险待遇水平有显著的负向影响,其中,在职职工年人均缴费额和职退比是影响我国养老保险待遇水平的最主要因素。我国调整养老保险待遇水平缺乏科学的依据,具体表现在养老保险待遇水平与居民人均消费性支出不相关。 相似文献
114.
王鹏 《数量经济技术经济研究》2013,30(3):114-127
基于多标度分形理论,提出了一种新的更适用于实际金融资产收益数据的非对称性测度方法——两阶段非对称性检验法(Two-step asymmetry testing,TAT),并运用Monte Carlo模拟考察了其与传统的偏度系数检验法的非对称性判定结论差异。实证结果表明:总体来讲,本文提出的两阶段非对称性检验法在常用检验水平下取得了较偏度系数法更为准确的金融资产收益非对称性判定结论,且两阶段非对称性检验法较偏度系数法更适用于具有非独立、非正态特性数据的非对称性检验。 相似文献
115.
Which covariates should be controlled in propensity score matching? Evidence from a simulation study
Nguyen Viet Cuong 《Statistica Neerlandica》2013,67(2):169-180
Propensity score matching is a widely‐used method to measure the effect of a treatment in social as well as medicine sciences. An important issue in propensity score matching is how to select conditioning variables in estimation of the propensity scores. It is commonly mentioned that variables which affect both program participation and outcomes are selected. Using Monte Carlo simulation, this paper shows that efficiency in estimation of the Average Treatment Effect on the Treated can be gained if all the available observed variables in the outcome equation are included in the estimation of propensity scores. This result still holds in the presence of non‐sampling errors in the observed control variables. 相似文献
116.
In state–space models, parameter learning is practically difficult and is still an open issue. This paper proposes an efficient simulation-based parameter learning method. First, the approach breaks up the interdependence of the hidden states and the static parameters by marginalizing out the states using a particle filter. Second, it applies a Bayesian resample-move approach to this marginalized system. The methodology is generic and needs little design effort. Different from batch estimation methods, it provides posterior quantities necessary for full sequential inference and recursive model monitoring. The algorithm is implemented both on simulated data in a linear Gaussian model for illustration and comparison and on real data in a Lévy jump stochastic volatility model and a structural credit risk model. 相似文献
117.
Usual inference methods for stable distributions are typically based on limit distributions. But asymptotic approximations can easily be unreliable in such cases, for standard regularity conditions may not apply or may hold only weakly. This paper proposes finite-sample tests and confidence sets for tail thickness and asymmetry parameters (α and β) of stable distributions. The confidence sets are built by inverting exact goodness-of-fit tests for hypotheses which assign specific values to these parameters. We propose extensions of the Kolmogorov–Smirnov, Shapiro–Wilk and Filliben criteria, as well as the quantile-based statistics proposed by McCulloch (1986) in order to better capture tail behavior. The suggested criteria compare empirical goodness-of-fit or quantile-based measures with their hypothesized values. Since the distributions involved are quite complex and non-standard, the relevant hypothetical measures are approximated by simulation, and p-values are obtained using Monte Carlo (MC) test techniques. The properties of the proposed procedures are investigated by simulation. In contrast with conventional wisdom, we find reliable results with sample sizes as small as 25. The proposed methodology is applied to daily electricity price data in the US over the period 2001–2006. The results show clearly that heavy kurtosis and asymmetry are prevalent in these series. 相似文献
118.
银行排队系统服务效率问题研究 总被引:1,自引:0,他引:1
潘向东 《技术经济与管理研究》2009,165(4):73-75
银行排长队现象是困扰银行和客户的难题,其实质是排队系统的效率问题。叫号机变多队一多服务台系统为单队一多服务台系统,改变了排队系统模型。本文运用蒙特卡罗仿真方法对两种排队系统模型进行比较,发现叫号机确实可以有效提升银行服务系统的效率。 相似文献
119.
Knowledge flows and the geography of networks: A strategic model of small world formation 总被引:3,自引:0,他引:3
This paper aims to demonstrate that the strategic approach to link formation can generate networks that share some of the main structural properties of most real social networks. For this purpose, we introduce a spatialized variation of the Connections model [Jackson, M.O., Wolinsky, A., 1996. A strategic model of social and economic networks. Journal of Economic Theory 71, 44–74] to describe the strategic formation of links by agents who balance the benefits of forming links resulting from imperfect knowledge flows against their costs, which increase with geographic distance. We show, for intermediate levels of knowledge transferability, clustering occurs in geographical space and a few agents sustain distant connections. Such networks exhibit the small world property (high clustering and short average relational distances). When the costs of link formation are normally distributed across agents, asymmetric degree distributions are also obtained. 相似文献
120.
Anastasios Michailidis 《International Journal of Tourism Research》2006,8(5):381-390
This paper provides an empirical example of the valuation of real options in a large‐scale tourism project. The main aim of this article is to elaborate the investment decision process in the evaluation of a ski centre enlargement project by employing elements of the real options methodology. Monte Carlo simulation was used to value the options as it offers the flexibility to directly simulate the uncertainty factors. Traditional discount cash flow analysis points the investment as profitable, although the real options approach proves it as not economically feasible. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献