前瞻性货币政策的微观传导机制有效吗*——来自中国上市企业资产负债表的证据

本文根据新古典资本需求理论和实际余额效应理论建立了一个包含投资需求和投资效率的前瞻性泰勒规则模型，并构造了一个反映企业投融资需求状况的企业综合状况指数，将其引入扩展的前瞻性泰勒规则模型，然后从宏观和行业两个层面对加入企业综合状况指数的前瞻性泰勒规则进行了检验和比较。研究发现：（1）前瞻性利率传导的企业资产负债表渠道基本有效，短期名义利率对于超过80%行业的企业综合状况指数缺口的反应系数显著，但对不同行业的反应差异较大;（2）短期利率对企业综合状况的反应系数较小，而对通胀缺口和产出缺口的反应系数相对较高，显示货币当局调整利率可能更多的是针对通胀缺口和产出缺口反应；（3）货币政策对资产价格“反应不足”，其对股价的反应系数非常小，对房价的反应系数不显著。     

State‐Dependent Forward Guidance and the Problem of Inconsistent Announcements

Forward guidance can be provided as an unconditional promise, i.e. commitment to a specific low policy rate. Alternatively, the promise may include an escape clause, i.e. a condition defining the state of the economy under which the central bank would not keep such a low rate and, instead, it would revert to setting policy under discretion. The escape clause can be expressed as a threshold in terms of a specific variable. The present paper shows that, when such a threshold is expressed in terms of an endogenous variable (e.g. output, inflation), there are cases where it becomes impossible for the central bank to act in a way that is consistent with its promise. Consistency imposes limits on the policy rate that can be set since reverting immediately to the optimal discretionary rate can be incompatible with exceeding the threshold.     

国家审计与内部审计协同研究

国家审计和内部审计在国家治理和公司治理中,由于各自优势的不同,各自发挥着同样重要的作用。在审计全覆盖的背景下,两者的协同联动是整合审计资源,减少资源重复浪费,提高国家审计效率效果的必然选择。本文以协同理论为基础,通过分析国家审计和内部审计的内涵,从政策角度出发探讨了目前我国协同联动的主要形式以及存在的问题,认为破除技术手段的制约和提升内部审计独立性是实现协同联动的必要基础。     

Agriculture–nutrition linkages with heterogeneous,unobserved returns and costs: Insights from Tajikistan

Agriculture–nutrition linkages (ANLs) have been increasingly investigated in the literature. However, nutritional returns and costs of household agricultural production practices (APPs) in semisubsistence settings are poorly understood. We fill these knowledge gaps using pooled cross-section data sets in Tajikistan, where semisubsistence farming and undernutrition coexist despite relatively good agricultural infrastructure and education systems. Agricultural diversification, yield enhancement, production expansion are positively associated with various nutritional outcomes, particularly in areas with poor food market access. Decomposition exercises suggest that nutritional returns and costs of these APPs vary across households, and the adoption of APPs is driven by the expected nutritional returns. In Tajikistan, improving nutrition through household ANLs requires growing the smallholder agricultural sector in multiple dimensions, including diversification, intensification, and expansion, while also understanding better the pathways of ANLs and addressing bottlenecks at appropriate stages of such pathways.     

我国物流业转型升级研究综述

中国经济已经到了只有转型升级才能持续健康发展的关键阶段,产业转型升级在国家政策文件和研究文献中出现的词频较高。文章以我国物流业为研究对象,从现有涉及到物流业转型升级方面的文献挖掘有效信息,梳理我国物流业转型升级研究的历史脉络,从供应链与价值链、产业集群、现代科学技术应用和产业联动四个视角对现有的物流业转型升级文献进行了总结和归纳,并从物流业转型升级的动力研究、阶段性划分研究和演进规律研究三个方面指出了现有文献的研究不足和以后可能的研究方向。其中,供应链与价值链视角侧重于物流企业的纵向角度,产业集群视角侧重于物流企业的横向角度。文章对于物流企业战略设计、政府政策的制定和理论研究具有一定的参考作用。     

Central Bank Policy Paths and Market Forward Rates: A Simple Model

Increasingly many central banks announce likely paths for future policy rates. Recent experience suggests that market forward rates can differ substantially from those announced. Models commonly adopted in policy analysis ignore such differences. This paper studies a simple model that can capture deviations between announced paths and market forward rates. We detail the macroeconomic transmission of such deviations and show how the model can inform policy deliberations.     

中国数字经济的投入产出与产业关联分析

在新一轮科技革命的推动下,数字经济蓬勃发展,对经济社会影响重大。分析数字经济产业的投入产出结构及其产业关联特征,对于发挥数字经济的带动和支撑能力、推动中国经济增长以及产业结构转型升级具有重要意义。本文使用2017年、2018年、2020年中国竞争型投入产出表对数字经济的投入产出结构和产业关联进行刻画,结果表明,第一,数字产业是传统制造业和服务业的重要中间投入和上游需求部门;第二,在产业静态关联方面,传统产业与数字产业的产业融合程度仍然较低,而数字产业对传统制造业和传统服务业的生产过程中均具有重要影响;第三,在产业动态联系上,数字制造业对国民经济各产业具有极强的需求拉动作用,但其他行业对数字产业的整体拉动作用较小。基于这些结论,我们为推动数字经济的发展提出了一些建议。     

连锁企业核心扩散与共生效应分析

研究连锁经营的核心扩散机理旨在揭示连锁单元扩张的内在规律。连锁经营就是要使核心能力通过连锁机制和连锁单元得以充分发挥,使它的经济运行效率达到可能的最优状态;连锁经营可以克服单体经营的有限性,从而大大提高经营效率,使连锁经营的生存能力和扩张能力提高,从中国连锁经营发展的进程来看,影响连锁单元增长速度的主要原因还是连锁总部的核心能力和连锁环境条件,而不是业内之间的竞争。     

基于网络处理器IXP2400的组播包高速转发技术

传统的IP报文的组播技术,由于在处理过程中需要把整个报文的内容报文复制多份,因此处理器需要对缓存报文的外部存储空间进行多次I/O操作,这严重制约了当前处理器,特别是网络处理器的高速报文处理能力,转发效率不高.为此,提出了一种新的技术--"零拷贝"转发技术.该技术只修改报文头,报文体不复制,减少了大量的I/O操作,提高了转发效率.     

Does foreign investment benefit the exporting activities of Vietnamese firms?

Using firm-level data, this paper examines the effects of foreign investment on the exporting behaviour of domestic firms in the Vietnamese manufacturing and service sectors. Applying the Heckman selection model on panel data and following the Wooldridge approach, we find that investment by foreign firms has a significant positive effect on the decision of domestic firms in the same and upstream sectors to export. The proportion of exports of domestic firms declines through horizontal and forward linkages, but increases through backward linkages in the manufacturing sector. However, there is only weak evidence in support of export spillovers on domestic firms in the service sector. We also find that the presence of foreign firms has differing effects on the exporting activities of low- versus high-tech firms in the manufacturing sector.