Risk-sharing networks and insurance against illness

Most risk-sharing tests on developing country data are conducted at the level of the village; generally, the full risk-sharing hypothesis is rejected. This paper uses detailed data on all insurance networks within a village in Tanzania; networks are not clustered but largely overlapping. We test whether full risk-sharing occurs within these networks. While village level full-insurance cannot be rejected for food consumption, we find evidence consistent with at least partial insurance of non-food consumption via networks.     

论中国经济学的现代化

纵观经济学在中国的历史变迁, 理论创新才是中国经济学的灵魂, 实现中国经济学的现代化, 必须解决中国经济学的本土化、国际化和规范化问题。本文认为, 中国经济学研究应从本土问题着手, 而其走向国际化的突破口在于将中国制度分析与经济发展有机融合, 重构发展经济学。同时中国经济学要求建立一个良性的理论创新、接受、修正、摒弃的规范化机制     

On Some Characteristics of Gaussian Covariance Functions

The concepts of isotropy/anisotropy and separability/non‐separability of a covariance function are strictly related. If a covariance function is separable, it cannot be isotropic or geometrically anisotropic, except for the Gaussian covariance function, which is the only model both separable and isotropic. In this paper, some interesting results concerning the Gaussian covariance model and its properties related to isotropy and separability are given, and moreover, some examples are provided. Finally, a discussion on asymmetric models, with Gaussian marginals, is furnished and the strictly positive definiteness condition is discussed.     

高校知识溢出与企业创新绩效

本文利用全样本数据探讨了作为创新和知识溢出微观主体的高校对企业创新绩效的影响。本文通过ArcGIS测算了2007—2015年上市公司所在地周边全部高校数量,并以企业研发投入金额、发明专利衡量企业创新水平,利用Anselin et al.(2000)的KPF方程,采用双聚类OLS检验高校知识溢出对企业创新行为的影响效应与机制。研究发现:第一,高校知识溢出对企业研发创新投入和有效创新产出均具有显著促进作用;第二,知识溢出效应具有显著的地理邻近性特征,而行政边界关联影响较弱;第三,高校知识溢出通过提高企业研发投入,提升员工和管理层人力资本,进而影响企业创新绩效。进一步研究表明,空间异质性、高校异质性、企业异质性、中心城市集聚效应、高铁开通等因素导致高校知识溢出效应存在差异。     

Relevance of corruption on the effect of public health expenditure and taxation on economic growth

We investigate whether corruption distorts the positive effect of public health expenditure and taxation on growth through panel data analysis of 75 developing countries for the period from 1995 to 2014. The findings indicate that, although both public health expenditure and taxation can increase economic growth, in countries with more corrupt governments this effect is reduced.     

The interplay between target firm R&D,acquirer debt financing and takeover premia

The level of acquisition premia is of paramount importance in light of the vast sums paid to target shareholders and the often disappointing returns realized by corporate buyers. In this letter, we focus on the impact of R&D investments by targets on the acquisition premium contingent upon the acquirer’s financing choices. Based on a unique hand-collected sample of 407 listed European transactions, we find a positive effect of target R&D on premia paid. Yet, when acquirers finance the acquisition of an R&D intensive target with debt, the positive relation disappears. Consequently, we establish that financing sources affect bidding strategies of acquiring companies in case of difficult-to-value targets.     

管理层权力、内外部监督与企业风险承担*

本文以2005—2014年中国沪深A股上市公司为样本,采用主成分分析法构建管理层权力的衡量指标,实证检验管理层权力对企业风险承担的影响。研究结果表明,管理层权力越大,风险规避的倾向越明显,企业风险承担水平越低;良好的内外部监督机制能弱化管理层权力对企业风险承担的抑制作用;渠道测试表明,管理层权力通过削弱企业的融资水平规避风险,而对企业投资无显著影响。本文拓展了管理层权力的经济后果及企业风险承担影响因素领域的文献,对引导管理者积极承担风险、加强上市公司内外部治理体系建设、维护中小股东权益具有重要的现实意义。     

Marxism,Crypto-Marxism and the Political Economy of Capitalism

ABSTRACT

This article conducts groundwork for a discussion of Marx’s influence through examining the boundaries of the specifically Marxian school of economics. This Marxian school extends well beyond the bounds of the self-identified Marxian school. Marx’s influence, Marxian themes and effectively Marxian theory can be found in several important heterodox traditions of economics, though this is often unacknowledged. A consideration of the proper boundaries of the Marxian school of economics is essential for a full understanding of Marx’s legacy and could contribute to the emergence of a more unified heterodoxy in economics.     

The Exchange Rate and its Fundamentals in a Complex World

We develop a nonlinear exchange rate model with heterogeneous agents. Some agents adopt a “fundamentalist” forecasting rule, while others use a “chartist” forecasting rule. We show that the model is capable of explaining the empirical puzzles relating to exchange rate movements. In particular, the model explains the “exchange rate determination” and PPP puzzles, the excess volatility, and fat tails in exchange rate returns.