An EOQ model for salesmen’s initiatives, stock and price sensitive demand of similar products - A dynamical system

The paper deals with an inventory model to determine the retailer’s optimal order quantity for similar products. It is assumed that the amount of display space is limited and the demand of the products depends on the display stock level where more stock of one product makes a negative impression of the another product. Besides it, the demand rate is also dependent on selling price and salesmen’s initiatives. Also, the replenishment rate depends on the level of stock of the items. The objective of the model is to maximize the profit function, including the effect of inflation and time value of money by Pontryagin’s Maximal Principles. The stability analysis of the concerned dynamical system has been done analytically.     

Stock repurchase with an adaptive reservation price: A study of the greedy policy

We consider the problem of stock repurchase over a finite time horizon. We assume that a firm has a reservation price for the stock, which is the highest price that the firm is willing to pay to repurchase its own stock. We characterize the optimal policy for the trader to maximize the total number of shares that they can buy over a fixed time horizon. In particular, we study a greedy policy, which involves in each period buying a quantity that drives stock price to the reservation price.     

On the explicit evaluation of the Geometric Asian options in stochastic volatility models with jumps

In the present paper we provide a semiexplicit valuation formula for Geometric Asian options, with fixed and floating strike under continuous monitoring, when the underlying stock price process exhibits both stochastic volatility and jumps. More precisely, we shall work in the Barndorff-Nielsen and Shephard (BNS) model framework. We shall provide some numerical illustrations of the results obtained.     

Inventory competition for newsvendors under the objective of profit satisficing

Inventory competition for newsvendors (NVs) has been studied extensively under the objective of expected profit maximization which is based on risk neutrality. In this paper, we study this classic problem under the objective of profit satisficing which is based on downside-risk aversion. Consistent with prior literature, we consider two possible scenarios. In the first scenario, each NV’s demand depends on the stocking levels of all NVs other than herself. In this scenario, we show that there is a unique Nash equilibrium where all NVs optimally order as if they were independent. In the second scenario, each NV’s demand depends on the stocking levels of all NVs including herself. We prove the existence of Nash equilibrium for both additive and multiplicative forms of demands. As a special case, we also study symmetrical NVs under the proportional allocation model. We show that at equilibrium, if the number of NVs exceeds a threshold, the market becomes highly competitive.     

工资上涨对我国物价和出口品成本的影响分析

近年来我国劳动者报酬增速低于国内增加值(GDP)增速,居民收入水平提高较慢.提高各部门工资水平、增加居民收入、使得居民收入与GDP同步增长成为保证我国经济快速稳定增长的必要措施.2010年我国大部分省市将最低工资标准提高20%以上,作者提出了新的区分加工出口的非竞争型投入产出价格模型,并推导出工资水平提高对我国物价以及出口品成本的影响公式.实际测算结果表明,工资上涨带来的通货膨胀及对出口品成本影响较小,我国应该及时出台相应的政策措施提高各部门工资水平.     

三种生成神经网络拓扑结构的方法在股票、商品价格预测中的应用及结果比较

对比了三种不同神经网络模型的生成方式:传统神经网络生成模型,遗传算法训练神经网络模型,以及在第二种方式训练参数的基础上,再使用传统神经网络优化生成模型.论文使用上述三种方法对代表性股票和商品价格进行拟合并预测,通过预测结果准确性和稳定性的比较发现:引入遗传算法后的神经网络在样本内的拟合误差有所降低,而第三种方法在样本外有最低的预测误差和最优稳定性.     

基于统一价格拍卖的初始排污权分配方法

针对初始排污权总量分配的实际问题,基于统一价格拍卖的思想提出了一种具有激励性的可变总量的分配方法,分别给出了排污企业对称和排污企业非对称两种情形下的线性均衡报价策略,并证明了该方法的可行性和有效性,从而为建设排污权分配和交易制度提供了理论依据和方法参考.     

我国铝期货、铝现货与废铝价格动态关系的实证研究

利用Johansen协整检验、Granger因果检验以及向量误差修正(VEC)模型、脉冲响应分析和方差分解分析,从三个不同的角度对我国铝期货、铝现货和废铝市场价格间的动态关系进行了实证分析,研究结果表明:从引导关系看,铝期货价格与铝现货价格之间具有协整关系,并且铝期货价格对铝现货价格及废铝价格具有单向价格引导关系,铝现货价格对废铝价格具有单向价格引导关系;从冲击反应看,铝期货对铝现货的冲击比较强烈,而铝期货对废铝以及铝现货对废铝的冲击相对比较和缓;从价格发现程度看,铝期货市场具有最强的价格发现能力,铝现货价格发现能力次之,废铝的价格发现能力最弱,表明铝期货是价格发现过程的主要驱动力量.     

以力学竞赛促进基础力学教改的创新与实践

以组织与辅导力学竞赛为契机,促进基础力学教学改革. 着眼于提高学生的力学素养与创新 能力,围绕如何创新基础力学教学新模式,从激发学生学习的热情与动力、改革教学实验、 提升力学课程建设等方面介绍了基于大学生力学竞赛培养力学人才与促进高校基础力学教学 改革的基本做法、实践效果与创新成果.     

中美燃料油期货价格引导研究

本文利用ADF单整检验、EG协整检验、误差修正模型、引导关系检验等方法研究中美燃料油期货价格之间的互动关系,结果表明:我国燃料油期货在价格和价格收益方面均与国际燃料油市场存在明显的即时引导关系;国际燃料油期货市场上的价格变动对国内燃料油期货价格以及价格收益的变动具有单向的滞后引导作用;我国燃料油期货市场的价格和收益方面的信息对于国际市场几乎不产生影响,我国尚不具备制定价格的话语权。