Identifying R&D partners through Subject-Action-Object semantic analysis in a problem & solution pattern

Today’s companies still rely heavily on expert knowledge rather than quantitative data with a systematic approach to effectively identify and choose Research and Development (R&D) partners. It is advantageous to identify and select potential R&D partners using a Problem & Solution (P&S) pattern. This paper presents a novel process for identifying R&D partners on the basis of solution similarities that assist technology managers in understanding the relationships between research targets. First, we choose a thematic dataset that contains problems and quantitative data with relative topic terms. Then, we extract Subject-Action-Object semantic structures in a P&S pattern from the dataset, and identify various solutions to a technical problem, with each as a subject. In addition, we provide correlation mapping to visualise the text characters and identify R&D partners. Finally, we validate the proposed method through a case study of the dye-sensitized solar cells sector.     

Is Gold a Hedge or a Safe Haven? An Analysis of Stocks,Bonds and Gold

Is gold a hedge, defined as a security that is uncorrelated with stocks or bonds on average, or is it a safe haven, defined as a security that is uncorrelated with stocks and bonds in a market crash? We study constant and time‐varying relations between U.S., U.K. and German stock and bond returns and gold returns to investigate gold as a hedge and a safe haven. We find that gold is a hedge against stocks on average and a safe haven in extreme stock market conditions. A portfolio analysis further shows that the safe haven property is short‐lived.     

审计收费与审计质量关系研究

审计收费是影响审计质量的重要因素,本文通过理论和实证检验等方法进行分析得出审计收费和审计质量在一定程度上是正相关关系,结合我国审计收费现状,提出了一些可行性建议。     

基于Spearman分析的中国开放式基金业绩持续性实证研究

许多普通投资者在对开放式基金进行选择时都会基于开放式基金业绩具有持续性的假定,通过对基金过去的业绩进行比较来判别基金的优劣,进而作出投资决策。文章应用Spearman相关分析的实证分析方法,对2003年12月31日之前成立的20只中国开放式基金的业绩进行了研究,旨在探讨开放式基金业绩具有持续性这一假定前提是否成立。结果表明,无论从短期还是长期来看,在目前市场为弱式有效的情况下,中国开放式基金业绩没有表现出显著的持续性,投资者在进行选择时并不需要太在意基金的历史业绩。     

辽河三角洲湿地景观格局脆弱性变化

目前湿地开发利用日益加剧,本文结合全局自相关、局部自相关进行空间关联分析的研究方法进行分析。虽然辽河三角洲区域脆弱度逐渐减弱,仍有部分地区存在高脆弱度值。数据表明2015年低脆弱度区基本覆盖整个辽河三角洲区域。     

资本结构与公司绩效的研究进展

国内外诸多学者对上市公司资本结构与公司绩效的关系进行了大量实证分析,且大部分以某一行业或地区的公司状况为研究对象,或从诸如内部的成长性等不同的角度分析资本结构与公司绩效之间的关系。论文梳理了国内外对两者间的关系的最新研究成果,并对已有的研究成果进行了评述;在此基础上,展望了两者间关系的研究趋势,以期为后续研究提供参考。     

非线性Leontief投入产出模型探析

基于经典（矩阵型）投入产出分析，引入了一类非线性（连续型）Leonfief投入产出模型和相应的投入产出方程及其相关的基本问题：模型的有效性（可解性）和连续性等。作为结果，以非线性分析为数学工具，给出了用企业的消耗算子所满足的边界性质描述的投入产出方程可解的若干充分性条件。     

The determinants of efficiency: the case of the Spanish industry

The aim of this paper is to analyse the factors explaining the technical efficiency of Spanish industrial sectors during the period 1991–1994 using the Survey of Business Strategies (SBE) of the Ministry of Industry and Energy. It analyses whether efficiency can be explained by factors external to the firm such as the degree of competition in the markets in which it operates, characteristics of the firm (size, organization, advantages of location, participation of public capital, etc.), as well as the effects of dynamic disturbances that may affect the degree of utilization of the productive capacity.     

Nonlinear models with panel data

Panel data play an important role in empirical economics. With panel data one can answer questions about microeconomic dynamic behavior that could not be answered with cross sectional data. Panel data techniques are also useful for analyzing cross sectional data with grouping. This paper discusses some issues related to specification and estimation of nonlinear models using panel data.JEL Classification: C230The research behind this paper was supported by the National Science Foundation, the Gregory C. Chow Econometric Research Program at Princeton University, and Danish National Research Foundation (through CAM at the University of Copenhagen). The author thanks Ekaterini Kyriazidou, Hong Li, Marina Sallustro, and the editors for helpful suggestions.     

A uniform weak law of large numbers under π-mixing with application to nonlinear least squares estimation

Abstract  In B ierens (1981) we have derived a uniform weak law of large numbers for stochastically stable processes with respect to a finite-dependent base. In this paper we show that this uniform weak law carries over to stochastically stable processes with respect to a, more general, φ-mixing base. This generalization will be used for relaxing the conditions for weak consistency and asymptotic normality of nonlinear least squares estimators.