孵化网络结构、风险传播对孵化网络最终健康水平的影响——结构可视化的调节作用

风险在孵化网络中的传播影响孵化网络健康水平，并会导致在孵企业高失败率与低成长率。为实现有效的网络治理，以两家国家级孵化器形成的实际网络为例，运用复杂网络理论中的SIR模型和仿真方法，模拟特定情境下风险在不同网络结构中的传播机理及其对孵化网络最终健康水平的影响。研究发现：孵化网络结构、风险传播与网络健康间具有显著相关性；在低初始健康分布情景下，无标度网络具有更快的恢复速度；在不同网络结构下，可视化水平均有助于提升孵化网络风险化解能力。     

Post-script—Retail forecasting: Research and practice

This note updates the 2019 review article “Retail forecasting: Research and practice” in the context of the COVID-19 pandemic and the substantial new research on machine-learning algorithms, when applied to retail. It offers new conclusions and challenges for both research and practice in retail demand forecasting.     

基于GM(1,1)模型的造纸业上市公司财务研究——以冠豪高新为例

财务风险是企业调整发展战略、提升管理水平的重要参考指标之一。财务风险预测模型的建立能够预测企业在中短期内的财务风险,为企业敲响警钟。以造纸业上市公司冠豪高新为例,选取近五年财务杠杆系数为风险指标,建立GM(1,1)风险预测模型,结果显示该公司短期内财务风险呈下降趋势,调查发现这主要得益于产品成本的降低以及营销策略的改变。     

Impacts of intermediate trade on sector structure

Structural changes, i.e. long-run changes in the agriculture-manufacturing-services-structure, are a key property of growth and development processes with massive impacts on economy and society and are part of actual debates regarding policy in developing and developed economies. While traditional literature has attempted to explain structural changes by using autarkic models, recent literature has emphasised the importance of deriving theories of structural change using open economy settings. We elaborate on the impacts of intermediate trade on sector structure. In particular, we study how import of intermediate products, which is increasingly feasible due to improvements in transport technology and political integration, affects sector structure in a multi-sector growth model with capital accumulation. This topic has not been studied in the previous literature on structural change in open economies, despite the fact that intermediate imports and capital accumulation are central aspects of modern developing and developed economies. We show that the impacts of intermediate trade on sector structure depend on three factors: productivity gains from trade, specialisation in international trade and development stage. Depending on the constellation of these factors, intermediate trade may accelerate, decelerate or have no effect on structural change. Thus, the effects of intermediate trade may vary strongly across countries.     

Manufacturing growth and local employment multipliers in China

We study the impact of employment growth in manufacturing on job creation in the non-tradable sector for prefecture-level cities in China. Using the 2000 and 2010 Censuses of Population, we apply the shift-share approach to isolate the exogenous change of employment growth in manufacturing. For every hundred new manufacturing jobs, we find that 34 additional jobs are created in the non-tradable sector. We also show that the effect is heterogeneous along a number of dimensions. More specifically, one new job in high-technology manufacturing creates more jobs in the non-tradable sector while low-technology manufacturing employment growth has no significant multiplier effect. Among the non-tradable industries, the multiplier is the largest for wholesale, retail, and catering. Finally, the effect is also geographically heterogeneous, with the multiplier being greater for inland regions.     

Panel LM unit root tests with level and trend shifts

This paper considers a Lagrange multiplier (LM) based panel unit root test that allows for heterogeneous structural breaks in both the intercepts and slopes of a series. We note that many popular time series variables are likely to exhibit changing means and/or trends over time. Given that the usual tests will depend on the nuisance parameters indicating the locations of the trend breaks, we adopt a transformation procedure that makes our new panel unit root tests invariant to the nuisance parameters. To illustrate the importance of the power gain provided by our test, we examine the convergence hypothesis using relative ratios of per capita health care expenditures in 20 OECD countries. Our results provide evidence that the convergence hypothesis is supported.     

公司为什么放弃债务的收益呢？

经典资本结构理论认为债务具有税盾效应和财务杠杆效应，因此公司会选择适当的负债以获得债务的税收收益。但是，现实中一些公司的负债很低，甚至为零。公司为什么放弃债务的税收收益呢？本文以2007～2011年中国A股上市公司为研究样本，从行为公司金融的视角分析管理者能力是否导致公司采用“低杠杆”策略。结果表明，中国上市公司存在普遍的低杠杆现象，管理者能力的差异是导致公司采用“低杠杆”策略的重要原因。     

How does leverage in stock market influence the margin of stock index futures?

In this article, we propose a margin-setting model under the assumption of extreme stock price changes. Specifically, extreme stock price changes are caused by the positive feedback effect of leverage and market impact. By introducing these factors into the futures price changes through a cost-of-carry model for setting the margin of stock index futures, we find that leverage and market impact in stock market are positively correlated with the margin.     

产业平衡态与产业有序发展的内在思考

深入阐述了以热力学原理解释产业发展过程的基本思路，引入熵的理念，结合经典燃烧理论，将产业温度用于模拟产业系统走向劣质化的基本表达，企图弥补哈肯和普利高津对系统如何从有序走向无序部分缺失的遗憾。在此基础上，围绕产业非线性与非平衡性，给出了产业运行正负熵流机制及其定量化公式表达，采用产业温度曲线刻画产业系统动态衍生过程，较为完整地勾勒出从“自然关系”到“逻辑关系”再到“函数关系”的内在科学理论体系。     

The funding of subsidiaries equity,double leverage and the risk of bank holding companies

Banking groups exploit double leverage when ‘debt is issued by the parent company and the proceeds are invested in subsidiaries as equity’. Financial authorities have frequently raised concerns about the issue of double leverage because this type of intra‐firm financing appears to allow for both the arbitrage of capital and the assumption of risk. This article focuses on the relationship between double leverage and risk‐taking within banking groups. First, we discuss this relationship based on an examination of balance sheet figures. Second, we analyze a large sample of United States Bank Holding Companies (BHCs) from 1990–2014. The results show that BHCs are more prone to risk when they increase their double leverage, namely, when the stake of the parent within subsidiaries is larger than the stand‐alone capital of the parent. This paper's primary implication for policymakers is that the regulators of complex financial entities should more efficiently address the issue of double leverage, thereby limiting the potential negative consequences that arise from corporate instability.