共享经济的实质:社会生产总过程视角

由传统经济向共享经济的变迁归根结底是生产力发展的结果.共享经济是根植于信息化社会生产力的新型经济发展模式.信息化社会生产力引发了各经济行为人的相互关系和利益分配的变化及生产组织的变革,从而使以共享平台为核心、高效协同的价值共创体系建设在技术上成为可能.共享经济作为一种新经济模式,也是由生产、分配、交换、消费四环节循环往复运动构成的经济体系.与传统经济相比,共享经济的生产过程、分配模式、交换方式和消费观念已发生深刻转变.在生产环节,共享经济以大规模协同生产为生产组织方式;在分配环节,共享经济采取分成制的分配模式;在交换环节,共享经济以两权分离基础上的使用权流转为特色;在消费环节,共享经济消费观契合并发展了马克思主义三层次消费观.社会生产四环节相互作用、界限趋于模糊,使共享经济成为一个动态、完整、高效协同的价值共创体系.     

A Geometrical Interpretation of Collinearity: A Natural Way to Justify Ridge Regression and Its Anomalies

Justifying ridge regression from a geometrical perspective is one of the main contributions of this paper. To the best of our knowledge, this question has not been treated previously. This paper shows that ridge regression is a particular case of raising procedures that provide greater flexibility by transforming the matrix X associated with the model. Thus, raising procedures, based on a geometrical idea of the vectorial space associated with the columns of matrix X , lead naturally to ridge regression and justify the presence of the well-known constant k on the main diagonal of matrix X ^′ X . This paper also analyses and compares different alternatives to raising with respect to collinearity mitigation. The results are illustrated with an empirical application.     

中国制造业上市公司创新行为对企业技术效率的影响研究

以2006-2008年的51家制造业上市公司为样本,运用DEA-Tobit模型,分别检验了研发投入和专利产出对企业技术效率的影响。实证结果表明:R&D经费投入对技术效率具有显著的积极影响;研发人员投入对技术效率的当期效应和长期效应均为正相关,但只在累积效应模型中通过了显著性检验;发明专利对样本企业的技术效率具有显著的积极影响,并具有明显的滞后性;实用新型专利对样本企业的技术效率具有显著的负效应,同时存在明显的滞后性;外观设计专利对样本企业的技术效率具有负效应,但不显著。结果启示,可以通过制定合理的研发战略来提升企业的自主创新能力,这是企业提高技术效率的重要途径之一。     

基于协同知识管理的智能城市创新体系研究

智能城市作为面向未来的城市发展方向,在其自身创新体系建设中面临的主要问题是知识管理的困难性和复杂性。对智能城市中知识管理任务的内涵进行了分析,提出了基于wiki-folksonomy的知识协同模式和面向智能城市的协同知识创新体系。     

Does distance matter in foreign direct investment sub-national location choice? Evidence from China

Multinational enterprises (MNEs) make investment decisions according to the distance factors at a sub-national level. This paper made estimates using the gravity model with provincial foreign direct investment (FDI) data from 2000 to 2012 and employed three concepts of distance. Our empirical results indicate that geographic distance and cultural distance have significant negative effects on FDI flow, whereas economic distance has a significant positive effect. It suggests that FDI prefers to locate in regions that are geographically and culturally close but economically distant from the home country, which further implies that FDI in China is dominated by vertical FDI. Our findings suggest that Chinese provincial governments should place emphasis on attracting FDI from culturally close countries and provide institutional support to encourage and promote horizontal FDI.     

新型抛料分配式多点卸料输送机的研发与应用

通过对比几种常用的粮食入仓多点卸料设备所存在的问题,综合考虑绿色节能、密闭环保、可靠方便等方面,本文研制了一种新型抛料分配式多点卸料输送机,在国内多个项目中得到了很好的应用。     

Excess perks in SOEs: evidence from China

In investigating the relationship between economic directors (EDs) and excess perks in state-owned enterprises (SOEs) in China, we find a U-shaped relationship between the share of EDs on boards and excess perks, especially in SOEs controlled by local governments and with greater managerial power—as well as in regions with poor legal systems. The share of EDs on boards may have three benefits with respect to reducing the use of excess perks in SOEs: (1) replacing excess perks with monetary wages more aligned with the value of managers; (2) reducing the increase in excessive perks caused by the availability of free cash flow; and (3) reducing the use of excess employees to drive excess perks.     

Cultural determinants of human capital accumulation: Evidence from the European Social Survey

Although economists commonly view the accumulation of human capital as a key driver of economic development, what drives cross-country differences in human capital accumulation remains poorly understood. I use an epidemiological approach involving second-generation migrants to test for a possible cultural gradient in individuals’ propensity towards human capital accumulation. Results indicate a strong relationship between country-of-origin culture and human capital accumulation and are robust to using years of education instead of individuals’ engagement in human capital accumulation as the dependent variable. Drawing on dimensions of cultural differences identified in culture frameworks developed by cross-cultural researchers, results further suggest that cultural emphasis on intellectual autonomy helps explain part of the observed differences in human capital accumulation. However, further work is needed to complete our understanding of the cultural roots of individuals’ propensity towards human capital accumulation.     

An empirical note about estimation and forecasting Latin American Forex returns volatility: the role of long memory and random level shifts components

Portuguese Economic Journal - A set of RLS-type models with ARMA and ARFIMA dynamics is estimated and compared in a forecasting exercise with ARFIMA, GARCH and FIGARCH models. It is an extension of...