农业减量化：农户经营的规模逻辑及其证据

本文将农户分为五种类型,并将农地规模分解为地块规模、经营规模与连片规模,由此构建“农户类型—规模形式—减量化行为”的分析框架,进而阐明农户减量化的规模逻辑。基于农户问卷的实证分析表明:①对于所有样本农户来说,地块规模越大,减施量越高。其中,追求产量最大化的生产型小农,减施量与经营规模呈“倒U”型变化,而追求多元化经营的功能型小农,减施量随经营规模的扩大而增加;②农户连片规模扩大,减施量就增高,并且能够增强地块规模扩大以及经营规模扩大对减施的促进作用;③农户社会服务卷入程度加深,能够增强地块规模、经营规模和连片规模扩大对减施的促进作用。据此,农业减量化,应鼓励农户开展连片种植,形成生产性服务的市场容量,然后诱导服务供应商提供专业化服务,进而实现服务规模经营对农地规模经营的替代。     

移动运营商和增值服务提供商关系模型构建研究

利用价值链分析工具揭示了影响增值业务产业价值链上运营商和增值服务提供商力量对比和关系发展的本质因素是客户数量和客户价值,将二者合称为客户质量,其中客户价值被量化为货币收益价值和客户增量。并以移动运营商和增值服务提供商关系特征为基础提出了客户引力假说,建立了运营商和增值服务提供商之间的力量对比模型以及关系模型。通过关系模型说明运营商和增值服务提供商在关系生命周期各个阶段的关系发展趋向,将其作为运营商与服务提供商实行关系营销的参考依据。     

社会融资总量与金融宏观调控新目标

社会融资总量是一定时期内实体经济从金融体系获得的全部资金总额,是反映金融业对实体经济资金支持的总量指标。目前,中国人民银行已经启动了对社会融资总量的统计监测工作,并致力于将其作为货币政策新的中介目标。社会融资总量包括信贷融资、证券融资、保险融资、其他融资等多种形式。加强对社会融资总量的统计、监测和调控,能够全面反映整个社会的流动性状况,有利于推进宏观审慎管理。     

Paradigm Conflict and the Wealth Effects of Blockholder Formation in Private Target Acquisitions

Decision making in public companies follows an organized structure dominated by risk aversion. The decisions in private entrepreneurial firms tend to be driven by overconfidence and reliance on trial and error. Such entrepreneurial attitudes are reinforced by high levels of profitability. The authors argue that this difference in decision-making paradigms limits the wealth effect of blockholder formation by the profitable private target's owners in mergers and acquisitions. Blockholder formation by private target owners is associated with substantial acquirer shareholder gains in the acquisitions of targets with relatively low and moderate profitability levels. To the opposite, the market reacts to blockholder formation by the owners of highly profitable targets with skepticism. Such announcements are associated with insignificant wealth effects overall and substantial acquirer losses in acquisitions in human capital-intensive sectors whereby disagreements are likely to be consequential. Acquirers understand these wealth effects and reduce the extent of stock financing when acquiring highly profitable targets.     

经济增长目标驱动投资吗?——基于2001-2016年地级市样本的理论分析与实证检验

已有文献发现政府制定的经济目标能够产生经济增长绩效,本文考察政府目标实现经济增长绩效的渠道和机制,提出经济增长目标驱动辖区投资增长的理论假说,并采用2001-2016年地级市政府工作报告公布的经济增长目标数据,对理论假说进行了验证。研究发现,经济增长目标每提高1%,地区投资显著上升约0.44%。这一发现在采用不同的核心变量度量指标、回归样本和估计方法后依然稳健。本文还发现,经济发展阶段和地区发展水平差异导致了目标驱动投资效应的异质性。随着经济发展阶段的转变,经济增长目标推动辖区投资增加的边际效应下降;在经济发展水平较高的东部地区,地方政府所制定的增长目标更有效地扩大了辖区投资。本文的研究发现有助于理解中国经济增长的内在动力机制,可为经济高质量发展转型提供政策启示。     

A hybrid DEA-MOLP model for public school assessment and closure decision in the City of Philadelphia

Data envelopment analysis (DEA) is generally used to evaluate past performance and multi objective linear programming (MOLP) is often used to plan for future performance goals. In this study, we establish an equivalence relationship between MOLP problems and combined-oriented DEA models using a direction distance function designed to account for desirable and undesirable inputs and outputs together with uncontrollable variables. This equivalence model can be effectively used to support interactive processes and performance measures designed to establish future performance goals while taking into account the preferences of decision makers (DMs). In particular, it allows DMs to consider different efficiency improvement strategies when subject to budgetary restrictions. The applicability of the proposed method and the efficacy of the procedures and algorithms are demonstrated using a case study where the performance of high schools in the City of Philadelphia is evaluated.     

Do cash flow imbalances facilitate leverage adjustments of Chinese listed firms? Evidence from a dynamic panel threshold model

This paper investigates the asymmetric impact of cash flow on firms’ leverage adjustments. We use a dynamic panel threshold model and estimate it with a newly-developed first-difference GMM approach, which allows endogeneity in both threshold variable and regressors. Employing data of 1054 Chinese listed firms during 2004–2016, we show that Chinese listed firms have leverage targets, towards which they adjust at an average speed of 25.9%. Moreover, firms with larger absolute cash flow adjust towards their leverage targets significantly faster than those with smaller absolute cash flow. This finding is robust to a post-financial crisis sample period, alternative measures of leverage and cash flow, and the incorporation of an additional control variable. We find evidence that cash flow imbalances facilitate leverage adjustments by reducing adjustment costs, and Chinese listed firms rely more on debt issues. These findings provide new insights on firms’ leverage adjustment and cash flow management.     

Valuing foreign exchange rate derivatives with a bounded exchange process

Foreign exchange rates have been subjected to periods of tighter or looser controls as various political and economic forces have waxed and waned. When currencies were backed by gold there were fixed exchange rates. In 1973 floating exchange rates were adopted though many countries did try to keep their currency values within certain ranges. More recently the European Economic Community formalized this practice. Free-floating exchange rates might be well characterized by the lognormal distribution which is standard in option pricing. However, this is probably a poor approximation for exchange rates which are kept within some range by the actions of one or both governments or central banks. This paper develops a model which can be used to value options and other derivative contracts when the underlying exchange rate is bounded in a fixed range (a, b). Methods for pricing both European and American style options are developed.The author would like to thank Ken French and Geert Rouwenhorst for their comments and suggestions.     

Types and functions of social relationships in the organizing of an international joint venture

This paper examines the use of social relationships in the organizing of a business network in the case of an international joint venture (IJV) developing over time. The organizing process and the multicultural setting of the international joint venture emphasize the actions of and interactions between individuals from various organizations. The IJV-managers' use of their social relationships in business organizing is explored through analysis of narratives of IJV-managers in a longitudinal single case to provide empirically grounded theory. From the in-depth interviews with IJV-managers the business relationships are identified as characterized by four possible levels of interpersonal relationships whose type influences the functions of the relationships and visa versa. One business relationship may contain only one or many of these interpersonal levels and an effective business relationship contains the appropriate interpersonal level for the business issue at hand.     

一种基于"当前"统计模型的自适应滤波算法

针对机动目标跟踪问题 ,在“当前”统计模型的基础上 ,利用机动加速度与方差的自适应关系 ,提出了一种新的自适应滤波算法。大量仿真结果表明 ,该算法在跟踪机动目标时 ,具有良好的跟踪性能。