老府河水体中有机污染物降解规律研究

在实验室条件下,模拟老府河水质状况,通过静态模拟实验,研究老府河中有机污染物的降解规律,确定有机污染物的降解系数,为老府河水环境容量的计算提供必要的参数,为河流综合整治方案的提出提供依据。     

以诚信纳税推进税收法治建设

当前的税收领域存在着信用状况不佳的问题,纳税人偷逃税、骗取出口退税、恶意拖欠税款等行为普遍存在;税务机关随意执法、执法犯法等现象时有发生。在市场经济条件下,一个完善的税收机制,既要有外在的税收法律体系的约束,也要在税收征纳行为中讲求信用这一道德基础。因此,税收信用是对税收法治的必要补充,有助于推进我国依法治税进程,从而建设和谐的税收环境。     

A comparison of optimal policy rules prior to and during inflation targeting: empirical evidence from Bank of Canada

We examine policy rules that are consistent with inflation targeting (IT) framework in a small macroeconomic model of the Canadian economy. We set up an optimal linear regulator problem and derive policy rules to compare the dynamics of pre-IT and IT eras. We find that while the optimal monetary policy rule in the pre-IT period is best described with a loss function that attaches equal weight to price stability, financial stability and output stability; the IT era is dominated by the price stability objective followed by the financial stability and output stability, consecutively. Moreover, we do not find an explicit role for exchange rate stability in the objective function of the Bank of Canada for both monetary policy eras. We, then, compare the properties of the derived optimal rules with those of an ad hoc Taylor rule for the IT period. In response to inflationary shocks, Taylor rule brings down inflation rates more quickly compared to the derived policy rules, but at the cost of a higher sacrifice ratio and more volatile interest rates.     

Comparing students by a matching analysis – on early school leaving in Dutch cities

In case of regional discretionary on the implementation of policy measures, central governments often consider differences in outcomes as an indication that one policy was more effective than another policy. If uniform incentives are provided to motivate regional policy makers, these incentives can be discouraging when the underlying populations differ. Empirically, this study compares early school leaving between the four largest Dutch cities. It shows that considering regional differences as performance measures can be dangerous if differences in population characteristics are not properly taken into account. Methodologically, this study contrasts the use of a traditional probit model with a more advanced iterative matching procedure.     

Does the monetary policy committee still care about inflation? Some evidence from a small macroeconomic model

This article derives an optimal Taylor rule for the UK economy using a simple estimated model based on data prior to the financial crisis of 2008. Optimal policy rules are calculated using simulation of the model over a long time period coupled with a search for optimal Taylor rule parameters using the Newton-Raphson loss minimization algorithm. The weights in the pre-crisis loss function are then inferred from the Taylor rule parameters estimated from the period corresponding to Bank of England independence, i.e. 1997–2008. These estimates are consistent with a low weight on inflation relative to output stabilization even before the crisis. The model is therefore consistent with the hypothesis that there has been no change in Bank of England preferences and that the Bank has responded to the crisis in a way which would have been predicted on the basis of its pre-crisis behaviour.     

中国上市公司费用“粘性”行为研究

费用“粘性”指当费用随着业务量的变化而变化时 ,其边际变化率在不同的业务量变化方向上的不对称性。本文讨论了费用“粘性”的内容和目前对此的理论解释 :“契约观”、“效率观”和“机会主义观”。通过对 1 995年 1 2月 3 1日前上市的 2 92家公司从1 994— 2 0 0 1年的数据进行的分析 ,本文发现 :(1 )中国上市公司确实存在费用“粘性”。同美国上市公司相比 ,中国上市公司向下调整费用的速度要慢许多 ,这很可能是由于中国企业管理水平的低下和经理层代理成本的高昂。 (2 )费用“粘性”确实在以后的会计期间出现反转。在时间跨度拉长的情况下费用的“粘性”明显降低 ,这说明中国上市公司的经营管理还有一些效率 ,但是效率尚不够高。 (3 )效率观所隐含的“宏观经济增长”和契约观所隐含的“资本密集型”两个变量对费用“粘性”的增强效果不显著 ,这也许说明目前中国上市公司的经理层行为包含了“机会主义观”的因素。     

Does a sudden death liven up the game? Rules,incentives, and strategy in football

Summary. In an effort to stimulate more attractive football, the international football association FIFA, has recently introduced the "sudden death" or "golden goal" rule for games going into extra time play. This paper analyses under which conditions, if any, the introduction of the sudden death rule improves the attractiveness of the football game. Our results indicate that the new rule will not change the behavior of equally powerful teams.Received: 20 November 2002, Revised: 12 May 2003, JEL Classification Numbers: C72, L83.A preliminary version of this paper was presented at Queens University of Belfast and University of Southampton. The authors would like to thank the seminar participants. Indraijt Ray and an anonymous reviewer for their useful comments on earlier versions of this paper. We specially thank Giulio Seccia for his constructive comments. We also acknowledge K.U. Leuven for providing research support.     

Commodity Taxation and the Effects of Entry: A Case of Variety Preferences

We study the relationship between commodity taxation and the effect of entry with imperfect competition. We develop a simple general equilibrium model with imperfect competition in which consumers have variety preferences. As a result, we see that introducing specific taxes increases social welfare. Furthermore, we show that the optimal tax rule is contrary to the inverse elasticity rule.Acknowledgement We wish to thank two anonymous referees for their helpful comments.     

政府与市场秩序的形成

市场秩序主要是一种内生和演化的秩序,大力发展市场经济是市场秩序形成的前提条件。政府在市场秩序形成和完善方面可以发挥应有的作用。政府与市场边界的恰当划分是构建市场秩序的一项重要内容,政府应当是宪制政府、服务政府和有限政府。治理整顿市场秩序的同时也要治理整顿政府自身。     

Asset Specificity,R&D Financing,And The Signalling Properties of The Firm's Financial Structure

Equity financing is the optimal strategy for innovating firms, which can use their financial structure as a signalling device to attract outside investors. This situation is likely to arise when the firm undertakes a specific purpose R&D project aimed at developing a certain product innovation. Typically, innovations of this kind draw on the firm's cumulative. idiosyncratic knowledge base and, accordingly, the innovation process involves an high degree of asset specificity. Under such circumstances, the terms of debt financing will be adjusted adversely, and equity financing will represent the most economically efficient solution.

These arguments are developed in standard static principal-agent models dealing with New Technology Based Firms and publicly held large firms undertaking an aggressive R&D strategy. In the case of NTBFs, two kinds of optimal venture capital contracts are considered, which render the sharing rules independent (a) of the agent's action and (b) of both the agent's action and the specific assets involved in the transaction. Regarding innovating large firms, it is argued that in this case, too, equity represents the optimal financing strategy, and that top executives use their equity share to signal the firm's expected return stream and value to outside investors.