Determinants of violent and property crimes in England and Wales: a panel data analysis

We examine various determinants of property and violent crimes by using police force area level (PFA) data on England and Wales over the period of 1992–2008. Our list of potential determinants includes two law enforcement variables namely crime-specific detection rate and prison population, and various socio-economic variables such as unemployment rate, real earnings, proportion of young people and the Gini Coefficient. By adopting a fixed effect dynamic GMM estimation methodology we attempt to address the potential bias that arises from the presence of time-invariant unobserved characteristics of a PFA and the endogeneity of several regressors. There is a significant positive effect of own-lagged crime rate. The own-lagged effect is stronger for property crime, on an average, than violent crime. We find that, on an average, higher detection rate and prison population leads to lower property and violent crimes. This is robust to various specifications. However, socio-economic variables with the exception of real earnings play a limited role in explaining different crime types.     

基于上下游企业不对称信息博弈的供应链应急协调

以供应系统的突发事件为研究对象,确定制造商作为供应链中的核心企业,引进紧急系数的概念,实现突发事件下对供应品的分类管理,在此基础上以制造商获得供应商告知实情、防止劣质产品供应以及期望收益的最大化为准则,对供需双方冲突进行博弈分析,给出期望收益的趋势图,并从时间、收益等多个维度刻画突发事件可能造成的危害和可挽救度,建立不同等级供应品的供应系统动态应急模型,分多阶段对突发事件进行动态协调,得到不同等级供应品的应急预案流程,促进突发事件的快速恢复,最后选取实际案例,对模型的可行性进行验证。     

Relevance of organizational capabilities and its dynamics: what to learn from entrants' product portfolios about the determinants of entry timing

The resource‐based view of the firm suggests that the timing of market entry by a firm depends on its resources and capabilities, but several important questions remain. First, in a high‐velocity market where capabilities change quickly, how does entry timing depend on the capabilities at varying points in time? Second, how much flexibility does a firm have in altering its capabilities to achieve desirable entry timing? To answer these questions, this study sets out to develop a dynamic, refined version of the resource‐based view that parameterizes a firm by its time‐varying capability relevance with respect to a focal market, and makes predictions on entry timing and future growth of capability relevance. The study develops a novel approach that uses the entrants' product portfolios to infer a potential entrant's capability relevance. The results based on a panel of potential entrants show that the initial and current capability relevance each affect entry timing alone, revealing the persistent effect of the initial condition. However, given the knowledge of the current capability relevance, the initial relevance has no effect on entry timing, suggesting that the initial relevance affects entry timing through its influence on the current relevance. Firms that are in an initially unfavorable position can still achieve early entry, provided that they improve their capability relevance over time. Copyright © 2008 John Wiley & Sons, Ltd.     

In the eyes of the beholder: the HRM capabilities of the HR function as perceived by managers and professionals

This study investigated factors influencing line managers' and professionals' perceptions of the HRM capabilities of the HR function. Using a sample of 913 managers and professionals in subsidiaries of 11 Nordic multinational corporations, we tested the extent to which features of the unit's HRM system, attitudes of the unit's general manager and characteristics of the HR manager helped explain the perceived HRM capabilities. The analysis revealed that perceived HRM practice visibility and HRM inducements (the link between individual performance and HRM‐related benefits) were strong predictors of individual perceptions of the HR function's HRM capabilities. The use of e‐HRM and the most senior manager's attitudes towards the unit's HRM practices were also significantly related to perceived HRM capabilities.     

The determinants of inbound tourism to Malaysia: a panel data analysis

Malaysia has experienced a significant increase in tourist arrivals over the past 10 years. The challenge is to sustain this growth and therefore it is important to understand the factors influencing inbound tourism to Malaysia. This paper investigates the economic and non-economic determinants of international tourist flows to Malaysia using the generalized method of moment. The annual panel data set includes the number of arrivals from 33 countries during the period 2000–2012, and the number of possible explanatory variables. It is found that habit persistence (word of mouth), income, hotel room and political stability have a positive impact on tourism demand for Malaysia. Also, results indicate that the estimated coefficients of substitute tourism price in the model are negative. This implies that the five alternative destinations are complementary destinations to Malaysia. In addition, the dummy variable for Visit Malaysia Year in 2007 and severe acute respiratory syndrome in 2003 had positive and negative impacts on tourism demand for Malaysia, respectively.     

A hedging policy for carriers’ selection under availability and demand uncertainty

We address a stochastic dynamic distribution problem where a family of products needs to be shipped from a warehouse to a distribution center (DC). Uncertainty is on carriers’ availability and demand at the DC. Internal, external and spot carriers must be optimally selected to minimize the expected discounted cost of transportation, inventories and shortages. We numerically prove that an optimal selection policy, SDMBSP, is based on three thresholds of the available inventory in the DC. A simulation model is proposed and proves the robustness of the SDMBSP and its outperformance over two other carrier selection policies.     

Brand Equity, Consumer Learning and Choice

The aim of this paper is to explore the links between brand equity, consumer learning and consumer choice processes in general and considering two recent trends in the market place: store brands and the Internet. We first review the advances that have occurred in brand equity research in marketing in the past decade, with particular emphasis on integrating the separate streams of research emanating from cognitive psychology and information economics. Brand equity has generally been defined as the incremental utility with which a brand endows a product, compared to its non-branded counterpart. We amplify this definition: we propose that brand equity be the incremental effect of the brand on all aspects of the consumer's evaluation and choice process. We propose an agenda of research based on this amplified definition.     

OPTIONED PORTFOLIO SELECTION: MODELS AND ANALYSIS

The mean‐variance model of Markowitz and many of its extensions have been playing an instrumental role in guiding the practice of portfolio selection. In this paper we study a mean‐variance formulation for the portfolio selection problem involving options. In particular, the portfolio in question contains a stock index and some European style options on the index. A refined mean‐variance methodology is adopted in our approach to formulate this problem as multistage stochastic optimization. It turns out that there are two different solution techniques, both lead to explicit solutions of the problem: one is based on stochastic programming and optimality conditions, and the other one is based on stochastic control and dynamic programming. We introduce both techniques, because their strengths are very different so as to suit different possible extensions and refinements of the basic model. Attention is paid to the structure of the optimal payoff function, which is shown to possess rich properties. Further refinements of the model, such as the request that the payoff should be monotonic with respect to the index, are discussed. Throughout the paper, various numerical examples are used to illustrate the underlying concepts.     

劳动关系发展趋势研究——基于概念演化视角的分析

目前学术界对劳动关系问题的探讨缺乏基础理论层面的研究,对劳动关系概念称谓、基本性质和演变规律缺乏卓有成效的系统研究.本文甄别了若干基础概念,认为劳动关系在不同时期、不同地域有着不同的表现形式,体现着不同的时代背景和内容特征,而劳动关系这一称谓更适合我国使用;总结了市场劳动关系的基本性质、分析了劳动关系现实冲击及其根由,提出了促进劳动关系趋向和谐发展的科学规制方法.