创业板上市公司财务风险识别及应对研究

创业板上市公司在获得更加广阔融资平台的同时,也面临着巨大的财务风险,包括筹资风险、投资风险、资金回收风险和受益分配风险。应完善创业板上市公司的治理机制,及时采取相应的风险防范和风险应对措施,加强外部治理,完善监管环境。     

我国煤炭类上市公司折旧政策的选择——基于企业所得税效率

本文探讨了固定资产折旧政策选择与企业所得税效率之间的关系。并在此基础上,以我国煤炭类上市公司为例,分析了这些企业无一例外地选择年限平均法计提折旧背后的动机,并为如何使企业选择适合的固定资产折旧政策提出了相关建议。     

Dynamic Tax Evasion with Habit Formation in Consumption*

We model the optimal intertemporal decision of an agent who chooses tax evasion and consumption, over an infinite lifetime horizon, where consumption is driven by habits. We find the following: (i) tax evaders reduce consumption in the early stages of habit accumulation and increase it over time; (ii) habit formation has a dampening effect on tax evasion; (iii) neglecting tax evasion can lead to habit overestimation; (iv) the effect of the tax rate on tax evasion is ambiguous; (v) heavy fines are more efficient than frequent controls in reducing tax evasion.     

NIT picking: The macroeconomic effects of a Negative Income Tax

I study a revenue-neutral reform of the U.S. income tax and welfare system that involves the adoption of a Negative Income Tax (NIT). The reform is undertaken in a life-cycle economy with individual heterogeneity and uninsurable idiosyncratic labor risk. The optimal NIT consists of a 22% rate and a transfer equivalent to 11% of per-capita GDP. The ex-ante average welfare gain is a 2.1% annual increase of individual consumption. I show that a NIT outperforms a flat tax reform (income tax plus deduction) by a considerable margin. The key consequence of the reform is that high-productivity agents increase their relative importance in the labor supply at the expense of low-productivity agents.     

Fractional integration in daily stock market indices at Jordan's Amman stock exchange

Using daily data on five sectoral indices from 2006 to 2014, this paper aims to investigate the possibility of fractional integration in sectoral returns (and their volatility measures) at Jordan's Amman stock exchange (ASE). Empirical analysis, using the log-periodogram (LP) and local whittle (LW) based semi-parametric fractional differencing techniques suggest that all sectoral returns at ASE exhibit short memory. However, in the case of volatility measures, we found evidence of long memory. Following the recent literature that argues that structural breaks in a time series could also explain the presence of long memory, we tested the volatility measures for the presence of structural breaks. We found that long memory in some volatility measures could be attributed to the presence of structural breaks. Furthermore, using impulse response functions (IRF) based on ARFIMA, we found that shocks to sectoral returns at ASE exhibit short run persistence, whereas shocks to volatility measures display long run persistence.     

产权性质、会计-税收差异与审计收费——来自中国A股上市公司的经验证据

］通过考察注册会计师对审计服务定价时是否考虑会计利润与应纳税所得额之间差异（以下简称“会计-税收差异”）所包含的财务信息,研究发现会计-税收差异与审计收费显著正相关。进一步区分产权性质后发现,对于国有控股上市公司来说,会计-税收差异与审计收费正相关,但这种相关性并不显著;而对于民营上市公司来说,会计-税收差异与审计收费显著正相关。研究结果表明,会计-税收差异会影响注册会计师对审计风险的判断,进而通过增加审计程序来降低审计风险,提高审计收费。且在审计定价时,对于不同产权性质的公司,注册会计师差别对待了会计-税收差异中所包含的信息。     

股权结构对上市公司并购重组绩效影响的研究——按关联与非关联交易分类

并购重组类型分为关联交易与非关联交易,利用2009—2013年沪深两市主板A股制造业发生并购重组的200家上市公司的非平衡面板数据,研究检验了股权结构对这两种不同并购重组类型的绩效影响。结果表明,在非关联交易中第一大股东的持股比例与并购重组短期绩效呈正相关,与并购重组长期绩效呈负相关,在非关联交易中,股权制衡度与短期并购重组绩效呈正相关与长期绩效呈负相关,在关联与非关联交易中,上市公司的控制人属性与并购重组绩效无相关关系。     

The impact of vertical integration on inventory turnover and operating performance

This paper investigates how vertical integration may influence inventory turnover and firm operating performance. A causal model is developed to investigate the effects of vertical integration on three types of inventory, namely raw materials inventory (RMI), work in progress inventory (WIPI) and finished goods inventory (FGI). The model tests the interactions between inventory types and the consequences of inventory turnover performance on various aspects of firm performance including costs and profitability. In particular, path analysis supports systematic differences with respect to how vertical integration affects RMI, WIPI and FGI. Vertical integration has a positive effect on RMI and FGI turnover but no significant effect on WIPI turnover. FGI contributes to a reduction in supporting processes costs which causes an improvement in return on sales (ROSs). Vertical integration impacts ROS directly.     

Impacts of an EC carbon/energy tax and deregulating thermal power supply on CO2, SO2 and NOx emissions

Emission of CO₂, SO₂ and NO_x are all closely linked to the burning of fossil fuels. Here we report on simulations done by linking a Sectoral European Energy Model (SEEM), covering energy demand in nine Western European countries, with the emission-transport-deposition model RAINS developed by IIASA. The study analyses emissions of CO₂, SO₂ and NO_x, deposition of sulphur and nitrogen and the extent of areas where the critical load for sulphur is exceeded in year 2000 under four different energy scenarios. Two different sets of future behavioural patterns for the thermal electric power production sector are considered. In one regime, called the plan-efficient regime, the sector is assumed to follow official plans with regard to investment in new capacity. In the other regime, called the cost-efficient regime, the thermal power sector is assumed to behave in a cost minimizing manner. The effects of the proposed EC carbon/energy tax are studied under both regimes, giving rise to altogether four scenarios.In both regimes the effect of the EC tax is to reduce emissions by between 6 and 10 per cent in year 2000 relative to the scenarios without the tax. A change of regime, from the regulated, plan-efficient regime to the market-based, cost-efficient regime, will, by itself, reduce emissions of CO₂ and NO_x by approximately 3 per cent, while SO₂ emissions are reduced by 13 per cent. The EC tax will reduce sulphur deposition by more than 5 per cent in the nine model countries under the plan-efficient regime. A change of regime further reduces the total deposition by 9 per cent. The area where depositions exceed the critical load is reduced by approximately 6 per cent in year 2000 by the tax in both regimes. Changing from the plan-efficient to the cost-efficient regime has a similar impact.Although the emission reductions due to the EC tax may seem modest, they are shown to have a sizeable effect on the technological abatement costs of reaching targets like those prescribed in the Sofia protocol on the stabilisation of NO_x emissions, and the Helsinki protocol on SO₂ emission reductions. This is part of what can be considered to be secondary benefits of the EC carbon/energy tax.     

On the efficiency of environmental instruments in a spatial economy

This paper develops an efficiency criterion to evaluate environmental policy instruments in a spatial economy. We call an environmental policy regime at the regional level efficient if it guarantees not only an efficient distribution of emission permits within a region, but also an efficient locational pattern of mobile firms across the regions of a federation. Using marketable pollution rights or emission taxes, efficiency in this broad sense can only be achieved if revenues of regional environmental agencies are not transferred to regional firms. Direct controls neither support an efficient allocation of emission rights within a region nor locational efficiency of firms.