凯恩斯革命中的创新与继承

凯恩斯革命是从理论、政策、方法三个层面展开的。货币非中性论、货币供给外生论、对萨伊定理的彻底否定构成凯恩斯革命的理论基础;财政政策和货币政策是凯恩斯革命赖以实现的政策工具;对经济学研究对象的纠偏、破除传统的两分法和首创货币经济学是凯恩斯革命赖以完成的方法论。与此同时,《通论》内在逻辑上的不一致性,与经典学派崇尚经济自由传统的趋同,决定了凯恩斯革命中的继承。由于经济运行的常态是非充分就业均衡,《通论》必然具有永恒价值。     

A note on nominal government expenditure targets

In IS-LM models, government expenditure is usually fixed in real terms. In this short note, we examine some of the implications of nominal government expenditure targets for both model stability and comparative statics. When a fixed money supply policy is in operation, nominal government expenditure targets may stabilize an otherwise unstable system. If this is the case, an increase in the nominal stock of money will reduce the price level in the long run.     

我国货币政策对经济发展贡献的实证研究

为了对我国货币政策等综合因素对经济发展的贡献作用展开分析与研究,采用国家统计局和相关部门公布的关于货币供应、经济发展总量、黄金价格、美元对人民币汇率等综合信息作为分析的基础数据(整个基础数据的时间跨度为1995年至2011年)。通过对上述数据的综合分析,从宏观层面对我国经济发展、货币供应等综合因素有了一个较为全面的认识。在此基础上,针对上述数据,利用计量经济学理论与方法,采用Eviews6.5分析工具,确定了人民币汇率、居民消费价格指数、黄金价格、上证指数、M2对中国经济发展存在统计学意义上的因果关系,由此确定了VAR模型的最终形式。基于该VAR模型,确定了中国货币政策等综合因素对经济发展的滞后周期为两个自然月。最后,针对上述VAR模型展开深入研究,为我国经济稳定、持续、高效的发展提出了明确的政策建议。     

关于我国货币政策促进经济增长的研究

人民银行货币政策目标是:保持人民币币值稳定并以此促进经济增长,所以搞清楚货币政策与通货膨胀、经济增长的关系就十分必要。通过计量分析可以得出:货币供应量M1的增长是推动GDP增长的主要因素,财政支出增长不是推动GDP增长的因素,但是不能否定其在反经济危机中的巨大作用;货币供应量M1的增长是推动CPI增长的主要因素;在制定货币供应量政策时,既要考虑到推动GDP增长的目的,也要受到CPI上涨的制约,需要在二者之间权衡;在制定利率政策时要研究均衡的利率,实际利率要向均衡利率靠近,并且要随着经济情况的变化及时调整,以达到最大的资本积累量,保证我国的长期经济增长。     

后金融危机的货币供给过剩及其效应

本文针对我国货币政策的操作特征,使用阈值协整方法扩展现有的货币需求模型,度量后金融危机时期的货币供给过剩及其对通胀与经济增长的非线性调节效应,并进而设定广义脉冲响应函数揭示货币供给过剩对通胀与经济增长的冲击效应。主要结论为:2009年第三季度以后,我国货币供给过剩且过剩幅度快速增加,其中名义M1过剩12.56%,名义M2过剩11.31%。2009Q3—2010Q3我国处于货币供给过剩机制下,在该机制下,央行谨慎地实施从紧货币政策,从紧货币政策对通胀和经济增长的调节效应相对较强。货币供给过剩对通胀和经济增长的冲击在前2年为正值,在随后近3年为负值。这说明我国现阶段适度宽松货币政策的退出必须谨慎,退出速度不宜过快。     

我国企业投资对财政货币政策冲击反应的实证分析

本文运用结构向量自回归（SVAR）模型方法研究了我国企业投资对财政货币政策冲击的反应。通过采用1998年1月～2009年4月的月度数据实证研究表明：在经济周期的不同阶段,央行控制货币供给量的能力存在差异,导致货币政策执行效果不同。在经济繁荣阶段,社会资金运用效率较高,不存在剩余流动性,央行可以较容易地通过调整基础货币和货币乘数控制货币供给总量。这时货币供给的外生性较强,货币政策作用效果比较显著;而在经济衰退阶段,可选择的投资机会较少,流动性相对过剩,货币供给内生性增强,这时央行采取扩张性货币政策不能有效提高货币供给量,货币政策作用效果减弱。短期内虽然财政支出对企业投资会产生正向影响,但是负向影响要大于正向影响,也就是说财政政策对企业投资具有明显的挤出效应。     

The Effects of Macroeconomic Policy with a Disparity in Price Elasticity Between Private‐ and Public‐ Sector Demands

We introduce a disparity in price elasticity between government demand and consumption demand into a simple money‐in‐the‐utility‐function model. This extension demonstrates that the effect of fiscal policies on production may be positive, negative, or neutral depending on the disparity in price elasticity between sectors. Because the effect of an increase in nominal money supply with constant nominal government expenditure is the opposite to that of a fiscal policy, a fiscal policy financed by seigniorage can have positive, negative, or no effects depending on parameter values. Moreover, the effect of simultaneous implementation of expansionary–contractionary policies depends on how they are combined.     

经济学向何处去——金融危机以来的经济学反思

自2008年全球金融危机爆发以来,经济学界有关经济学的反思一直不断。理论方面,宏观经济理论和模型以及“有效市场假说”的有效性成为争论的焦点;政策领域,关于财政政策的有效性和通胀目标的设定出现了重大分歧;研究方法上,围绕着数学与经济学之间的关系以及经济学模型化方法纷争不断。然而,反思中也呈现出共识因素,从而揭示了经济学未来可能的发展方向。理论上,金融因素及更为现实的市场缺陷和摩擦因素将更多地被纳入经济学理论和模型中进行讨论,并且处理这些因素的模型也将更趋多元化;政策上,亟须发展出一套理论框架为财政政策和更为广泛的货币政策提供理论依据,货币政策将回归到数量工具、价格工具和其他工具并用的传统;方法上,超越数学的更为广泛意义上的多样化技术工具将积极发挥作用,模型会向更具现实性因而也更为复杂化的方向发展。除了危机的外部冲击外,经济学的这种路径转向可能还需要该学科内部制度性激励结构的相应变革。     

财政支出、税收与经济增长

This paper assesses the effect of fiscal policy on economic growth in an AK model with endogenous labor supply. It is found that the structure of taxation and government expenditure could affect the long-run growth rate through their effect on households’ labor-leisure choice, saving-consuming choice and the proportion of government expenditure to GDP. Barro’s (1990) plausible result that the growth rate and the income tax rate have an inverted-U relationship does not always hold. In addition, based on the panel data of 31 provinces from 1997 to 2007, we investigate the link between components of government productive expenditure and economic growth. It is found that the productive expenditure does not always have a positive effect on the growth rate, and its effect exhibits regional differences. The reason is that there is an excess amount of the government productive expenditure in China or the efficiency of the government productive expenditure may be too low.     

日本政府财政支出的经济增长效应及启示

政府财政支出与经济增长存在一定的相关关系,但孰为因果莫衷一是。通过对1956-2008年日本政府财政支出与经济增长的协整分析和格兰杰因果关系检验,发现日本政府财政投资性支出与财政消费性支出均与经济增长长期内存在稳定的正向协整关系及单向因果关系,经济增长是财政支出增长的格兰杰因,而财政支出无论是投资性还是消费性支出都不是经济增长的格兰杰因。从这一结论出发,我国应吸取日本的经验教训,在实施积极的财政政策时,要控制规模、优化结构、确保质量、提高效益。     

我国货币供给规模与经济增长关系的实证研究——基于Enger-Granger协整理论分析

金融是现代经济的核心,在经济增长中的促进作用日趋明显。货币供给量的变动是政府进行宏观调控的主要手段。在金融危机的背景下,研究货币供给变动对经济增长的作用尤为重要。通过Engle-Granger两步法和误差修正模型（ECM）验证了货币供给量、年末贷款与GDP之间存在长期和短期波动关系,并证明其长期的作用更为明显。这对分析和了解我国宏观经济政策具有深远的意义。     

PERSISTENT IDEOLOGY AND THE DETERMINATION OF PUBLIC POLICY OVER TIME*

This article investigates how public policy responds to persistent ideological shifts in dynamic politico‐economic equilibria. To this end, I develop a tractable model to analyze the dynamic interactions among public policy, individuals’ intertemporal choice, and the evolution of political constituency. My main finding is that a right‐wing ideology may increase the size of government. Data from a panel of 18 OECD countries confirm that after controlling for the partisan effect, there is a positive relationship between the right‐wing political constituency and government size. This is consistent with my theoretical prediction, but hard to explain by existing theories.     

Intertemporal Budget Policies and Macroeconomic Adjustment in Indebted Open Economies

This paper analyzes the role of government intertemporal budget policies in a growing open economy including nominal assets in the presence of an upward sloping supply of debt. This introduces transitional dynamics that influence the effects of government policy instruments on economic growth and the long term fiscal liability. It is shown that capital income taxes or a combination of tax‐cum‐expenditure or government expenditure alone can balance the long term intertemporal government budget constraint. However, those results are shown to depend critically upon the extent of distortion in capital flows brought about the upward sloping supply of debt.     

Central bank instruments, fiscal policy regimes, and the requirements for equilibrium determinacy

This paper examines the role of the monetary instrument choice for local equilibrium determinacy under sticky prices and different fiscal policy regimes. Corresponding to Benhabib et al.'s results for interest rate feedback rules [Benhabib, J., Schmitt-Grohé, S., Uribe, M., 2001. Monetary policy and multiple equilibria. American Economic Review 91, 167–185], the money growth rate should not rise by more than one for one with inflation when the primary surplus is raised with public debt. Under an exogenous primary surplus, money supply should be accommodating—such that real balances grow with inflation—to ensure local equilibrium determinacy. When the central bank links the supply of money to government bonds by controlling the bond-to-money ratio, an inflation stabilizing policy can be implemented for both fiscal policy regimes. Local determinacy is then ensured when the bond-to-money ratio is not extremely sensitive to inflation, or when interest payments on public debt are entirely tax financed, i.e., the budget is balanced.     

Coordinating macroeconomic policy in a simple AK growth model

Modern theories of government finance stress the importance of an economy’s fiscal deficits in determining the course of monetary policy. Modern growth theory stresses the role of monetary factors in economic growth. This paper explores how these two are interrelated, using a simple AK growth model, one with money, reserve requirements, and government debt. We provide a comprehensive look at the coordination of macroeconomic policy and its effects on long-run growth under three alternative coordinating arrangements. We uncover some unconventional results regarding the relationship between growth and a number of policy variables; these rest squarely on the constraint of the coordination process.     

The Significance of the Monetary Context of Economic Behavior

The dominant paradigm in economics views economic behavior as allocative activity in a neutral, C-M-C' economy. As a consequence, money is treated as a veil that is inessential to the real functioning of the economic system. This paper argues that one of Keynes's fundamental insights is the significance of the monetary context of economic behavior. This insight has been developed by the post-Keynesian theory of money as a "time-machine vehicle" that provides the causal link between uncertainty and unemployment. The Circuitist theory of money as the means of final payment provides a complementary radical perspective on the significance of the monetary context. This paper investigates the methodological and theoretical implications of these radical monetary theories and assesses their contribution towards the development of a general theory of a monetary production, M-C-M' economy.     

中国货币供给与通货膨胀的关联性研究

关于货币供给与通货膨胀的关联性,学者们还没有形成一致的看法.理论上,货币供给与通货膨胀具有一定的关联性.通货膨胀有需求拉动型和成本推动型,在通货膨胀的原因中有“货币因素”,也有“非货币因素”.实证检验表明:中国货币供应量与物价指数不存在长期的稳定均衡关系,但货币供应量是物价指数的格兰杰原因,反之则不然.事实上,中国通货膨胀或通货膨胀压力一方面是与货币供给有关,另一方面还与结构性因素有关.因此,要实现中国经济的低通胀运行:一是实行总量均衡和结构合理的货币供给模式;二是采取更有效的货币政策;三是推进经济结构调整,实现国际收支平衡;四是深化金融体系改革,增强中央银行货币控制能力;五是进行汇率机制改革;六是通过财政政策调整供需结构.     

环境保护各种政策工具的比较研究

由于环境污染是一种负的外部性,如果任由市场自由调节,其结果不仅不利于社会目标的实现,而且从长期看也不利于经济的可持续发展,因此政府必须进行干预。而在政府干预的各种政策工具中,不同的政策工具其特点与适用条件是不同的,政府应该根据不同的情况选择不同的工具。本文从经济学的角度对各种政策工具在解决环境保护问题中所起的作用进行了分析与论证,并提出了相关的政策建议。     

A Search Model of Money and Circulating Private Debt With Applications To Monetary Policy

A search-theoretic model is used to examine the coexistence of money and circulating private debt. Money is still valued even though there coexists credit which circulates among agents and dominates in the rate of return. When there coexist multiple equilibria, the equilibrium with credit Pareto dominates the one without credit if money supply is not extremely plentiful. This article also provides some predictions about the effects of monetary policies. A policy of open market operations whereby government discounts less for second-hand debt decreases the value of money, credit, and interest rate prevailing in the market. This policy can also improve welfare by making credit trade feasible when the only equilibrium entails no credit without intervention.     

比较经济学对中国经济理论发展的影响(1978～2005)

文章结合1978年以来中国经济理论的演进,论述了比较经济学在中国经济理论发展进程中所发挥的作用与影响。文章认为,比较经济学对中国经济理论发展的影响主要表现在以下三个方面:对中国经济理论范式转换的影响,对中国经济理论的方法论的影响以及对中国社会主义市场经济理论发展的影响等。分析表明:中国经济理论是在中国经济改革的实践探索中得到检验和发展的。在中国经济理论发展进程中和改革开放形成的中外学术交流的背景下,比较经济学在中国的传播促进了中国经济理论的发展。