Persistence of Output Fluctuations Under Different Exchange Rate Regimes

In a recent paper, Giugale and Korobow (2000) present evidence that suggests that the time required by output to return to trend following a financial shock is faster under a flexible exchange rate regime than under a fixed exchange rate. In this paper, we use vector autoregression models to measure the persistence properties of output for a number of countries in the Asia–Pacific region. Our results suggest that output persistence is not uniquely related to a country's choice of exchange rate regime. The two countries in our sample with the least persistent output following a financial shock are Australia, where the exchange rate is fully flexible, and Hong Kong, where it is rigidly fixed via a currency board.     

马铃薯保健面包制备工艺优化及品质分析

以马铃薯雪花全粉、鸡油菌多糖溶液、高筋面粉为主要原料制备马铃薯保健面包,优化了马铃薯保健面包的制备工艺条件,并以普通马铃薯面包为对照,分析了二者质构参数、保水性、膳食纤维和蛋白质含量的差异.结果表明,马铃薯保健面包的最佳工艺条件为鸡油菌多糖溶液添加量15％,发酵时间2.0 h,烘烤温度200℃,烘烤时间21 min;马...     

供应链在逆向物流下的最优库存比较研究

供应链中的库存协调是供应链管理的一项重要工作。文中分析研究了由一个供应商和一个生产商组成的供应链在集成条件下和分散条件下的最优库存,并求解在一种逆向物流情况下,能有效提高供应链整体效率的库存。     

最优化理论与方法在油田产量优化研究中的改进

结合油田生产实际对最优化理论与方法在油田产量优化中的应用作了切实的改进,提出了新的模型设计,并以某油田的数据参数为例对改进后的优化模型进行了实证分析,取得了较好的模拟效果。     

基于粒子群算法的证券组合投资模型的研究

从证券组合模型的概念,给出证券组合多目标决策模型。并用模糊优选法将证券组合多目标优化转化为单目标优化。同时,重点描述了粒子群算法,并采用自适应变异的粒子群算法对证券组合投资模型进行求解,最后编程实现证券组合模型的最优解,试验结果表明此方法取得了较好的效果。     

我国医药零售企业国际比较与对策研究

随着我国加入WTO及世界经济一体化 ,我国在医药流通领域的管制将于 2 0 0 5年放开。以我国医药零售业的代表企业———深圳一致药业股份有限公司、上海华氏大药房有限公司为例同世界巨头———CVS和Walgreen在企业的发展历史、赢利模式、绩效评价指标分析等方面做横向比较 ,找出我国医药零售企业和世界巨头的差距 ,在此基础上才能从产业组织结构优化的角度制定出相应的措施     

The tactical and strategic value of hedge fund strategies: a cointegration approach

This paper analyzes long-term comovements between hedge fund strategies and traditional asset classes using multivariate cointegration methodology. Since cointegrated assets are tied together over the long run, a portfolio consisting of these assets will have lower long-term volatility. Thus, if the presence of cointegration lowers uncertainty, risk-averse investors should prefer assets that are cointegrated. Long-term (passive) investors can benefit from the knowledge of cointegrating relationships, while the built-in error correction mechanism allows active asset managers to anticipate short-run price movements. The empirical results indicate there is a long-run relationship between specific hedge fund strategies and traditional financial assets. Thus, the benefits of different hedge fund strategies are much less than suggested by correlation analysis and portfolio optimization. However, certain strategies combined with specific stock market segments offer portfolio managers adequate diversification potential, especially in the framework of tactical asset allocation.

养老保障制度"优化"理念分析

本文立足于养老保障制度的多层次和可持续发展目标,提出养老保障制度“新三支柱”和“八层次”优化理念,以及养老保障优化的性质界定、优化主线、优化效果、优化核心、优化目标。养老保障制度优化性质就是采取一定措施使养老保障水平“适度”和养老制度“可持续”发展。养老保障制度优化主线是养老资源的合理利用和效应最大化,也就是养老“人、财”体系的效用改进。养老保障制度优化的效果是构建一个“结构合理,功能提升,效率改进,发展持续”的养老制度体系。养老保障制度优化的核心是解决“资金平衡”和“利益均衡”。养老制度的优化标准和目标是制度的可持续发展,具体表现为养老制度的优化与风险控制、国民财富分配、人口结构、居民收入水平、社会文化等要素契合协调发展。在此基础上,提出优化养老方式整体效率、优化多层次抗风险、优化多责任破解时代难题、优化多元个人生命周期等政策建议。     

Of stars and galaxies – Co-authorship network and research

We examine the association between network centrality and research using the accounting research community setting. We establish co-authorship network using papers published in the five top accounting journals from 1980 to 2016. We find that the co-authorship network in accounting is a “small world” with some most connected authors playing a key role in connecting others. We use machine learning to label published papers with multiple topics and find patterns in topics over time. More importantly, we find that co-authorship network centrality is positively associated with future research productivity and topic innovation and that the impact of centrality on productivity is higher with more senior authors. Further, centrality of an author’s co-authors also has an incrementally positive impact. We conclude that network centrality positively influences research output.     

技术进步中生产要素产出弹性关系假说及其检验

本研究提出了一个生产要素产出弹性关系假说,即在技术中性条件下,管理要素的产出弹性与劳动要素的产出弹性成正比,与资本要素的产出弹性成反比。通过构建自变量包括资本、劳动和管理要素的简单宏观生产模型,理论上证明了上述假说,经验上利用1970-2006年美国的时间序列数据和OECD七国面板数据也较好验证了假说。这种理论假说的分析和研究结果为我国继续回到经济快速增长的轨道而进行的政策选择空间提供了一个方向性指导。