Determinants of Residential Land-Use Conversion and Sprawl at the Rural-Urban Fringe

We estimate a probit model of residential land conversion using parcel-level data from a rural-urban county in Ohio. Spatial landscape pattern metrics are used to quantify land-use patterns and to link patterns of residential sprawl with factors estimated to influence parcel-level land conversion. Findings indicate that the location of new residential development is influenced by preferences for lower density areas that nonetheless are close to existing urban development. Combined, these forces have generated a moderated pattern of residential sprawl. Spatial error autocorrelation is controlled using a spatial sampling technique that enables consistent estimation of the probit model.     

The dynamics of price elasticity of demand in the presence of reference price effects

The authors derive an expression for the price elasticity of demand in the presence of reference price effects that includes a component resulting from the presence of gains and losses in consumer evaluations. The effect of reference price is most noticeable immediately after a price change, before consumers have had time to adjust their reference price. As a result, immediate-term price elasticity is higher than long-term elasticity, which describes the response of demand long after a price change, when reference price effects are negligible. Furthermore, because of the differential effect of gains and losses, immediate-term price elasticity for price increases and price decreases is not equal. The authors provide a quantitative definition for the terms immediate term and long term, using the average interpurchase time and the discrete “memory” parameter. Practical consequences of the distinction between immediate- and long-term elasticities for the estimation and use of elasticity values are discussed. Gadi Fibich (fibich@math.tau.ac.il) is an associate professor in the Department of Applied Mathematics at Tel Aviv University. This research grew out of his interest in applications of mathematical modeling to economics and management science. He is currently working on auction theory. Arieh Gavious (ariehg@bgumail.bgu.ac.il) is a senior lecturer in the Department of Industrial Engineering at Ben Gurion University, Israel. His interest is in application of game theory to economics and management science problems. His current interest is in auction theory. Oded Lowengart (odedl@bgumail.bgu.ac.il) is a senior lecturer in the Department of Business Administration at Ben Gurion University, Israel. His research interests are in the areas of modeling pricing effects on consumer behavior at both aggregate and disaggregate levels, product positioning, and market share forecasting and diagnostics.     

Spillover effects and conditional dependence

A better understanding of cross-market linkages and interactions would help to better manage international financial exposure. So far, no attempt has been made to investigate the degree of price and volatility spillovers in a non-Gaussian conditional framework. We present a new model for these transmission mechanisms that relies on asymmetric-t marginal distributions and a copula function to characterize the conditional dependence. Rendering the dependence parameter time varying, we investigate how the dependence structure is affected by stock return innovations.     

新兴高技术企业发展的网络根植性研究

新兴高技术企业的发展取决于其对资源的获取和利用,取决于其与外部网络间的互动联系。新兴高技术企业在获得网络支持的同时,其发展也同时受到网络的约束。以网络根植性理论和资源依赖观点为基础,构建了新兴高技术企业发展的系统进化模型,对其发展的动态过程进行了研究。     

由金融抑制到金融深化的路径选择——国际比较与中国经验

上世纪90年代以来,一些实施金融深化发展战略的发展中国家相继爆发了金融危机,这不仅加剧了学术界的理论争论并产生某种理论偏向,而且更是使那些正在或准备实施金融深化战略的发展中国家对金融深化理论产生了动摇和怀疑。在对金融深化理论进行综述和评价的基础上,结合发展中国家的金融改革实践,对金融深化理论和实现路径提出了一些看法。     

Linear Correlation and EVT: Properties and Caveats

Due to the current credit crisis, critical questions are beingasked concerning some of the quantitative methods used in riskmanagement under the Basel II proposals. In this paper I havegiven a critical look at Extreme Value Theory and Copulas. Boththeir potential applications and the possible caveats are discussed,and this mainly with the subprime crisis as a background.     

数字金融、银行信贷渠道与货币政策传导

作为新兴金融业态,数字金融发展会对既有金融体系带来怎样的冲击和影响?聚焦于货币政策传导机制这一宏观命题,立足于我国以银行信贷渠道为主导的数量型中介,运用我国商业银行、A股上市公司的微观面板数据,本文深度剖析了数字金融发展与货币政策银行信贷渠道传导之间的内在联系和影响机理。研究发现:(1)数字金融发展显著弱化了货币政策银行信贷渠道的传导效应,采用工具变量法克服内生性和控制影子银行变量等一系列稳健性检验后的结果依然支持该结论。(2)具体而言,数字金融削弱银行信贷渠道传导效果是通过改变银行资产负债结构和弱化实体企业对银行贷款的依赖而实现的。(3)上述弱化效应在以城市和农村商业银行为主的中小型金融机构以及低资本、低流动性和低报酬的银行中尤为突出。     

The strategic impetus for social network ties: reconstituting broken ceo friendship ties

Research on organization–environment relations has focused primarily on formal linkages between organizations such as board interlock ties as a strategy for managing resource dependence. This study examines whether top corporate executives may maintain more informal ties to executives of other firms in order to manage uncertainty arising from resource dependence. Our point of departure is prior research on boards of directors that has examined whether so‐called ‘broken board ties’ (i.e., ties that are disrupted due to executive turnover) tend to be reconstituted, and whether resource dependence explains the likelihood of reconstitution. These studies have generally provided little evidence that corporate board ties are used to manage resource dependence. We draw from theory and research on social embeddedness and friendship to suggest that, as a strategy for managing dependence, the maintenance of friendship ties between top executives provides benefits that are comparable to the supposed benefits of board cooptation, while imposing fewer constraints on the organization. Our theory leads to the contention that, despite limited prior evidence that resource dependence determines the formation of formal board ties, corporate leaders may nevertheless reconstitute informal (i.e., friendship) ties to leaders of other firms that have the power to constrain their firms' access to needed resources when those ties have been disrupted (e.g., due to turnover of the CEO's friend). We test our hypotheses with a unique dataset that includes survey data from U.S. corporate leaders collected at two points in time, thus permitting an assessment of whether top executives reconstitute broken social ties to leaders of other firms, and whether various sources of resource dependence predict the likelihood of reconstitution. We discuss implications for strategic perspectives on inter‐organizational relations and the sociological literature on embeddedness. Copyright © 2006 John Wiley & Sons, Ltd.     

我国对外技术依存度的测算及浅析

建设创新型国家成为国家的战略目标,而对外技术依存度的高低成为衡量创新型国家的一个重要指标。针对当前对外技术依存度算法的不足,提出一种全新的测算方法,从技术依存度的内涵出发系统地构造衡量指标和计量模型,运用因子分析方法对我国对外技术依存度进行了测算,并简析其原因。结果显示,中国的对外技术依存度在快速提高,并处于很高的水平,表明我国的技术对外依赖程度非常高,经济技术发展受制于人,我国亟需加强自主创新。