建设项目全要素集成造价管理模型研究

根据工程量清单招标的工程造价构成及费用发生特点，对合同项目的计价活动进行模块划分；运用建设项目全要素集成造价管理的理论与方法，完成了工程造价基本参数模块划分；便于准确、及时、完整地收集实时数据，进行偏差分析和造价预测；同时结合工程造价动态控制原理、工作结构分解方法等构建了建设项目全要素集成造价管理模型。     

Model selection in random effects models for directed graphs using approximated Bayes factors

With the development of an MCMC algorithm, Bayesian model selection for the p ₂ model for directed graphs has become possible. This paper presents an empirical exploration in using approximate Bayes factors for model selection. For a social network of Dutch secondary school pupils from different ethnic backgrounds it is investigated whether pupils report that they receive more emotional support from within their own ethnic group. Approximated Bayes factors seem to work, but considerable margins of error have to be reckoned with.     

福建省生产与总产出的计量经济模型

本文论述建立一个能反映福建省生产和总产出经济活动关系的计量经济联立方程模型,对模型进行了历史模拟和事后预测,并进行产出结构分析.     

Age-specific dynamic labor demand and human capital investment

To study the optimal age-specific labor demand and human capital investment at the firm level we extend the standard dynamic labor demand model by introducing ‘age’ as a second dynamic variable and distinguish between two types of workers: ‘low skilled’ and ‘high skilled’. Applying an age-structured optimal control model we derive qualitative features of the optimal age-specific hiring and training effort. For the case of a linear revenue and production function we prove that firms do not anticipate changes in adjustment costs in their optimal decisions. This result no longer holds if a nonlinear revenue or production function is considered.     

Estimation in the generalized Poisson model via robust testing

An estimation method is presented which compromises robust efficiency with computational feasibility in the case of the generalized Poisson model. The formal setup is built on flexible nonparametric extensions of the underlying model. The estimation efficiency is expressed via minimax properties of tests resulting from expansions of estimators. The nonparametric neighborhoods related to the proposed score function are exemplified and a real data case is analysed. The resulting method balances several qualitative features of statistical inference: strong differentiability (asymptotic derivations are more accurate), efficiency and natural model extension (quality of formal basic assumptions).     

城市物流基地选址问题研究

本文将物流基地纳入城市交通网络中，以体现交通状况对物流基地选址的影响。在进行选址时，以运输费用和基地的投资、管理费用总和最小为规划者的主要目标，建立目标函数。选址的上层模型体现了运输费用和基地投资费用、管理费用最小的原则，下层模型体现了入选点的不同对交通流量分配的影响，下层模型是求解上层模型的基础。     

The Dynamics of Capital Structure in Transition Economies

This paper uses a dynamic unrestricted capital structure model to examine the determinants of the private companies' target financial leverage and the speed of adjustment to it in two transition economies, the Czech Republic and Bulgaria. We explicitly model the adjustment of companies' leverage to a target leverage, and this target leverage is itself explained by a set of factors. The panel data methodology combines cross-section and time-series information. The results indicate that the Bulgarian corporate credit markets were less supply -constrained than those of the Czech Republic during the period under investigation. Bulgariancompanies adjusted much faster to the target leverage than Czech firms. The speed ofadjustment related positively to the distance between target and observed ratio for Bulgarian companies while the relationship was neutral for Czech companies. The conservative policies of Czech banks and the exposure control were likely responsible for the slower adjustment among the larger companies while the opposite were true for Bulgarian banks and companies.     

创业投资公司的后续管理模式设计

文章认为创业投资的后续管理是创业投资机构或专家减少投资风险,确保预期的投资收益率的重要手段。文章以某创业投资公司设计的积极干预型后续管理模式为例,探讨该管理模式把增值服务揉合在监控过程之中,使其能有效地介入创业企业的管理,并进一步突破信息不对称的束缚、减少各种代理风险。     

基于熵的改进TOPSIS法在业务外包供应商选择中的应用

影响3PL选择的因素很多．其中交货提前期（T）、产品质量（Q）、变货可靠度（R）和产品价格（P）等4个因素是3PL选择的关键因素。本文就从这4个关键因素着手，从现代供应链管理要讲究战略的角度出发．引进基于熵的改进TOPSIS法，选择合适的3PL．和企业建立起长期的合作伙伴关系。     

基于多目标决策的应急物资供应商选择

应急物流是以提供突发性自然灾害、突发性公共卫生事件等突发性事件所需应急物资为目的,以追求时间效益最大化和灾害损失最小化为目标的特种物流活动。本文针对应急物流中的应急物资采购问题,在分析了应急物资供应商选择的影响因素的基础上,构建了基于交货准时性、质量、成本的多目标供应商选择模型,并给出了算例求解。