Resource saving and productivity enhancing impacts of crop management innovation packages in Ethiopia

Crop management innovations are often not discrete fixed stand‐alone options—and their adoption may imply various combinations and adaptations. This potentially confounds their impact assessment. This article assesses the resource saving and productivity enhancing impacts of a crop management package revolving around minimum tillage in maize‐based farming systems in northwest Ethiopia. An endogenous switching regression model was applied to plot‐ and household‐level survey data collected from 290 rural households operating 590 maize plots during the 2012 production year. Controlling for variations in plot and household characteristics, the average effect of minimum tillage package (minimum tillage package) on maize productivity is 0.44 t/ha. Compared to conventional practice (CP), adoption of the MTP decreased the average male and female labor use in maize production by 14.4 and 8.2 person‐days per ha, respectively. Similarly, MTP adoption decreased draft power use for land preparation by 13.2 pair of oxen‐days per ha. Compared to CP, in general, there is a considerable short‐run maize productivity gain and reduction in labor and draft power use under MTP.     

全球股票市场间风险传染的测度、监管及预警

近年来,伴随金融一体化程度的加深,全球各股票市场间风险传染的动态复杂性加剧,其准确测度、高效监管及实时预警已成为优先事项。本研究选取全球21个代表性股票市场作为分析样本,首先基于广义向量自回归模型的滚动估计准确测度其间风险动态传染的高维网络序列,进一步借由矩阵值因子模型来稳健收缩上述序列,以探究其潜在动态核心结构,从而实现高效监管。最后,通过向量自回归模型的预测功能实现对全球股票市场间风险传染的实时预警。研究表明,全球股票市场间风险传染具有时变性,其监管与预警可通过少数与地理区域高度相关的风险区域间的动态传染关系及内部的市场构成来刻画。与此同时,我们发现中国内地等新兴市场的重要地位逐渐凸显。本文研究结论可为有效防范与化解金融风险提供有益参考。     

CHILD CARE PRICES AND MATERNAL EMPLOYMENT: A META‐ANALYSIS

The literature estimates for labor force participation elasticity with regard to child care prices are extensive and varying. While some estimates imply substantial gains from child care subsidies, others find insignificant effects. To determine the causes of the variance, this paper reviews and analyzes the elasticity sizes using estimates from 36 peer‐reviewed articles and working papers in the literature. We start by reviewing the theoretical and empirical aspects related to participation elasticity with regard to child care costs, paying special attention to sample characteristics, methodological aspects, and macro level factors. We conclude by providing a meta‐regression using control variables based on our review of the literature to explain some of the differences between the estimates. As research builds on and improves the methods and assumptions in prior works, elasticity estimates have become smaller over time. This decline might also be partially explained by changes in labor market characteristics. In countries with high rates of part‐time work and very high or very low rates of female labor force participation, we find elasticity rates to be smaller.     

资本深化、技术进步与全球化下的劳动报酬份额

劳动报酬在国民收入中所占份额,一定程度上决定了一国最终消费需求大小。本文在新古典分配模型基础上,讨论了资本深化、技术进步以及全球化对我国劳动报酬份额影响机制,并运用省际面板数据进行实证分析。结果显示,具有资本增强属性的技术进步和过快的资本深化,偏离了现阶段我国要素禀赋结构,显著地降低了我国劳动报酬份额,全球化对提高我国劳动所得影响不明显。最后,本文给出了相关政策建议。     

国际价值链分工模式下上海汽车产业升级路径研究

20世纪80年代以来,随着经济全球化的不断深入发展,国际分工也正经历着从产业间到产业内,再到产品内价值链分工不断深化的过程.这一新趋势不但拓宽了经济开放国家或地区的国际分工参与度,也使产业升级具有了有别于传统产业升级的新内涵和实现途径.本文通过对国际价值链分工模式下地方产业升级内涵的探讨,结合上海汽车产业在当代国际价值链分工中的地位分析,提出了促进上海汽车产业升级的路径选择和对策思路.     

集体林区生态公益林建设对劳动力转移的影响——以浙江省为例

生态公益林作为我国政府强化生态文明建设的重要举措,在保障生态安全方面发挥着重要作用.本文使用浙江省的农户调查数据,使用Heckit模型实证检验了农户生态公益林面积和生态公益林损失性补偿对农户家庭劳动力转移的影响.结果表明:尽管生态公益林面积的增加促进了农户劳动力转移,但是生态公益林补贴与劳动力转移呈现出倒U形关系,即随...     

基于广义价值论的内生增长理论初探

增长理论是经济学的重要部分,关系到每一个人的福利和一个国家的地位。文章运用广义价值论研究经济增长问题,以分工为切入点,把分工产生的新增利益和该利益的公平分配统一起来,论述了递增性假设之外另一条增长的可能路径。主要结论如下：（1）基于比较优势的分工交换可以持续地产生比较利益即超过自给自足收益的净收益,这一收益不依赖于技术的递增或递减变化,具有普遍持久稳定性;（2）由分工交换产生的净收益构成原始积累的重要来源,既促进了生产规模和分工范围的扩大,又支持了研发和技术进步;（3）劳动生产力任何提高的效应都通过分工交换产生的比较利益加以放大,在一个分工交换系统中,行为主体提高比较优势产品和比较劣势产品的生产力分别具有正的和负的外部性;（4）基于广义价值论的内生经济增长体现了效率与公平的统一,一个好的制度是能够保证在交易中各方的比较利益率相等,掠夺性制度不仅直接损害经济增长,也不具备长期可持续性。     

Transition to market economics: Employment and informal activity in rural areas

According to the neo-liberal model, the high levels of unemployment and collapsing real wages of transition will reallocate labor to new activities. But whether and how households actually reallocate labor is the subject of growing debate. We use survey data from Bulgaria to develop a typology of rural households based on their labor allocation characteristics. We find a diversity of outcomes. A significant share of households experience no change in labor allocation, some shift labor to own commercial enterprises, but a significant minority are displaced from the emerging market economy. Potential for informal activity among these households appears limited. Of great concern is the regional concentration of such households.     

产业内贸易对劳动力市场调整的影响分析——基于中国制造业面板数据的SAH检验

随着中国经济全球化进程的深化,外贸对国内经济的影响日益显著。根据平滑调整假说(SAH),劳动力市场调整成本会随着产业内贸易水平的提高而降低。基于中国制造业22个细分行业面板数据进行检验,本文发现间隔3年的边际内产业指数最为有效,且产业内贸易水平对劳动力市场调整具有滞后效应,但回归分析结果并不支持SAH。随着产业内贸易比例扩大,劳动力的产业间调整增加,而并非产业内的调整。此外,劳动生产率和国内显性需求对劳动力市场调整有很大影响,在产业内贸易水平较高的行业内,劳动生产率的这种影响更加显著,而显性需求和产业内贸易水平影响作用较弱。     

Demystify the labor statistics in China

In contrast to the great changes from a planning economy to market economic system, the transition in statistics system is left behind. The problem is quite serious in labor statistics. The paper reviews how the current labor statistical system collects the data and its reliability. By analyzing relevant indicators, the paper points out that policy-making based on the current labor statistics may mislead the outcomes in the Chinese labor market. To improve the labor statistics, a deep and comprehensive reform in the statistical system is required.