数量规则还是利率规则？——我国转型时期量价混合型货币规则的理论基础

本文对我国货币政策转型时期兼顾数量和价格的货币政策调控实践进行了深入的分析。在货币数量论和货币效用模型的基础上,从理论上阐明了货币数量规则与利率价格规则的等价关系,并构建了符合中国货币政策实践的数量与价格混合型货币政策规则。这对于更好地理解我国货币政策转型时期的量价混合型货币政策操作具有重要的理论和现实意义。相关推论表明,正是由于数量和价格混合型货币规则,在利率低于均衡水平的情形下,中国的货币增速并未引发恶性通胀;修正的物价稳定泰勒原理表明,利率调整幅度小于通胀变化仍能够实现物价稳定。对中国的经验分析支持了理论和推论结果。在利率市场化基本完成和流动性格局逆转的当下,货币政策价格调控方式转型的必要性和迫切性日益上升,转型的条件日趋成熟。     

Determinacy and expectational stability of equilibrium in a monetary sticky-price model with Taylor rule

Recent studies show that the Taylor rule possesses desirable properties in terms of generating determinacy and E-stability of rational expectations equilibria under sticky prices. This paper examines whether this policy rule retains these properties within a discrete-time money-in-utility-function model, employing three timings of money balances of the utility function that the existing literature contains: end-of-period timing and two types of cash-in-advance timing. This paper shows: (i) even a small degree of non-separability of the utility function between consumption and real balances causes the Taylor rule to be much more likely to induce indeterminacy or E-instability if this rule responds not only to inflation but also to output or the output gap; (ii) differences among the three timings strongly alter conditions for the Taylor rule to ensure both determinacy and E-stability.     

数量规则还是利率规则？——我国转型时期量价混合型货币规则的理论基础

本文对我国货币政策转型时期兼顾数量和价格的货币政策调控实践进行了深入的分析。在货币数量论和货币效用模型的基础上,从理论上阐明了货币数量规则与利率价格规则的等价关系,并构建了符合中国货币政策实践的数量与价格混合型货币政策规则。这对于更好地理解我国货币政策转型时期的量价混合型货币政策操作具有重要的理论和现实意义。相关推论表明,正是由于数量和价格混合型货币规则,在利率低于均衡水平的情形下,中国的货币增速并未引发恶性通胀;修正的物价稳定泰勒原理表明,利率调整幅度小于通胀变化仍能够实现物价稳定。对中国的经验分析支持了理论和推论结果。在利率市场化基本完成和流动性格局逆转的当下,货币政策价格调控方式转型的必要性和迫切性日益上升,转型的条件日趋成熟。     

确定情形下的货币、利率与内生经济增长

通过对消费和资本投入施加预付现金约束,在内生经济增长框架（AK模型）下建立了一个封闭的货币经济体,并构建了以利率为核心的分析框架。研究表明,在确定情形下,利率的改变会影响代理人的消费与投资,并进而对价格和经济总体的消费与投资产生影响,货币当局可以通过利率以间接控制货币供给;当货币供给变化时,经济总体的消费与投资等变量也会发生变化,货币不是中性的;通过比较最优利率政策与Friedman法则,发现两者惟一的区别仅在于最初期利率的不同。     

Payments systems and monetary policy

A dynamic spatial model is constructed where there is a role for money and for centralized payments arrangements, and where there are aggregate fluctuations driven by fluctuations in aggregate productivity. With decentralized monetary exchange and no centralized payments arrangements, there is price level indeterminacy, and the equilibrium allocation is inefficient. A private clearinghouse arrangement improves efficiency but produces a real indeterminacy. The pricing of daylight overdrafts is irrelevant for the equilibrium allocation. Efficiency is achieved with a zero nominal interest rate on overnight central bank lending, or through private overnight interbank lending.     

Instrument instability and short-term monetary control

The literature on instrument instability tends support to a policy of smoothing interest rates: it contends that rigid adherence to a monetary rule would bring about explosive interest-rate movements. This contention is examined using a simple model which incorporates rational expectations; the results suggest that instrument instability is associated with interest-rate smoothing rather than with short-term control of the money supply. Furthermore, policy that attempts to stabilize interest rates may itself account for empirical findings which have hitherto been viewed as evidence that instrument instability would occur if the money supply were closely controlled.     

中国开放条件下货币政策操作规则的实证检验

从1994～2006年的季度数据来看,中国货币政策操作一直遵从McCallum规则,Taylor规则不适合中国国情。这意味着,如果中国经济结构不发生大的变化,就可以根据历史数据回归得到的McCallum规则的各种参数和通胀缺口、实际汇率、货币乘数、货币流通速度等变量的预期变化测算出合理的基础货币增长率,并将为调控基础货币供给提供重要参照。     

Using a long-term interest rate as the monetary policy instrument

Using a short-term interest rate as the monetary policy instrument can be problematic near its zero bound constraint. An alternative strategy is to use a long-term interest rate as the policy instrument. We find when Taylor-type policy rules are used by the central bank to set the long rate in a standard New Keynesian model, indeterminacy—that is, multiple rational expectations equilibria—may often result. However, a policy rule with a long-rate policy instrument that responds in a “forward-looking” fashion to inflation expectations can avoid the problem of indeterminacy.     

Revenue maximizing inflation

A classic monetary policy result is that revenue maximization entails setting the inflation tax rate equal to the inverse of the interest semi-elasticity of the demand for money. The standard approach underlying “Cagan's rule” is partial equilibrium in nature, treating money demand as being given from outside the model and abstracting from the real effects of inflation. This paper reconsiders the question of the revenue maximizing inflation rate in a general equilibrium framework with a labor-leisure choice, where money is held because it reduces transactions costs. In this framework, the revenue maximizing inflation tax rate is lower than that implied by Cagan's rule.     

Distortionary Taxation, Debt, and the Price Level

This paper compares the determinacy of equilibria under exogenous interest rates in an economy with a cash constraint, in which taxation is lump-sum or distortionary. Under passive fiscal policies lump-sum taxes generate nominal indeterminacy, while with distortionary taxes indeterminacy can be real, but not purely nominal. In general, under distortionary taxation uniqueness of the equilibrium allocation depends on monetary and fiscal policy interactions through taxes, debt, and interest rates. To illustrate this principle, we consider balanced-budget policies under distortionary income taxation and show that a unique equilibrium allocation prevails if interest rates are set consistent with long-run deflation. A separate section extends the analysis to endogenous interest rates.     

居民风险偏好与中国货币政策的宏观经济效应——基于DSGE模型的数量分析

当前,我国宏观经济形势复杂多变,货币政策实施效果的影响因素随之呈现多样化特征。在此背景下,本文试图以风险偏好为研究视角,对我国居民风险偏好水平变动与货币政策宏观经济效应之间的关系进行分析。本文以标准新凯恩斯模型为基础,构造符合我国宏观经济现实特征的DSGE(动态随机一般均衡)模型,并对转型时期的最优混合型货币政策规则进行研究;为进一步强调货币在中国宏观经济波动中所扮演的重要角色,模型中引入消费和实际货币余额不可分的跨期效用函数形式。研究结果表明:(1)包含名义货币增长的混合型泰勒规则拟合我国转型时期的货币政策规则效果最佳,因此货币供应量仍是重要的政策工具;(2)与可分性模型相比,不可分模型拟合我国宏观经济现实特征的效果更优。在不可分效用函数下,与货币供应量相关的实际货币余额将影响经济的产出缺口和通货膨胀,使得居民风险偏好成为决定货币政策效果的重要因素。具体而言,当居民风险偏好水平上升时,货币政策对我国宏观经济波动的影响随之增强。因此,在选择货币政策实施时点上,应充分考虑市场中的风险偏好情况,从而更好地发挥货币政策调控宏观经济的职能。     

Why Money Growth Determines Inflation in the Long Run: Answering the Woodford Critique

Woodford argues that it is not appropriate to regard inflation in the steady state of New Keynesian models as determined by steady‐state money growth. Woodford instead argues that the intercept term in the monetary authority's interest rate policy rule determines steady‐state inflation. In this paper, I offer an alternative interpretation of steady‐state behavior, according to which it is appropriate to regard steady‐state inflation as determined by steady‐state money growth. The argument relies on traditional interpretations of the central bank's power in the long run and appeals to model properties that are common to textbook and New Keynesian analysis. According to this argument, the only way the central bank can control interest rates in the long run is via affecting inflation, and its only means available for determining inflation is by determining the money growth rate.     

Optimal Constrained Interest-Rate Rules

We show that if policymakers compute the optimal unconstrained interest-rate rule within a Taylor-type class, they may be led to rules that generate indeterminacy and/or instability under learning. This problem is compounded by uncertainty about structural parameters since an optimal rule that is determinate and stable under learning for one calibration may be indeterminate or unstable under learning under a different calibration. We advocate a procedure in which policymakers restrict attention to rules constrained to lie in the determinate learnable region for all plausible calibrations, and that minimize the expected loss, computed using structural parameter priors, subject to this constraint.     

居民风险偏好与中国货币政策的宏观经济效应——基于DSGE模型的数量分析

当前,我国宏观经济形势复杂多变,货币政策实施效果的影响因素随之呈现多样化特征。在此背景下,本文试图以风险偏好为研究视角,对我国居民风险偏好水平变动与货币政策宏观经济效应之间的关系进行分析。本文以标准新凯恩斯模型为基础,构造符合我国宏观经济现实特征的DSGE(动态随机一般均衡)模型,并对转型时期的最优混合型货币政策规则进行研究;为进一步强调货币在中国宏观经济波动中所扮演的重要角色,模型中引入消费和实际货币余额不可分的跨期效用函数形式。研究结果表明:(1)包含名义货币增长的混合型泰勒规则拟合我国转型时期的货币政策规则效果最佳,因此货币供应量仍是重要的政策工具;(2)与可分性模型相比,不可分模型拟合我国宏观经济现实特征的效果更优。在不可分效用函数下,与货币供应量相关的实际货币余额将影响经济的产出缺口和通货膨胀,使得居民风险偏好成为决定货币政策效果的重要因素。具体而言,当居民风险偏好水平上升时,货币政策对我国宏观经济波动的影响随之增强。因此,在选择货币政策实施时点上,应充分考虑市场中的风险偏好情况,从而更好地发挥货币政策调控宏观经济的职能。     

时变概率的区制转换泰勒规则设计及其“稳定器”作用机制研究

本文将传统泰勒规则发展为具有时变转换概率的马尔科夫区制转换泰勒规则,基于Kim(2004)以两步MLE方法估计了该货币政策规则,并证明了其稳定器作用。研究发现:(1)货币政策中规则性成分的稳定器作用存在非对称性,在区制一内,规则性成分不存在稳定器作用,在区制二内,规则性成分有较强稳定器作用;(2)货币政策中相机抉择成分可以影响各区制的自我演化概率,在进行相机抉择逆周期调控的同时,又可以引导经济系统转向规则性成分有稳定器作用的区制。文章最后根据该货币政策规则的稳定器作用机制给出货币政策操作模式,在经济增长放缓时期,中央银行应该以增大基础货币增长和宽松型窗口指导为直接操作工具,以短期名义利率为中间目标;在经济高涨时期,中央银行应该以提高直接标价法的中美汇率水平和上调存款准备金率为直接操作工具,以短期名义利率为中间目标。     

Fiscal Consequences of Paying Interest on Reserves

We review the role of the central bank's balance sheet in a textbook monetary model and explore what changes if the central bank is allowed to pay interest on its liabilities. When the central bank (CB) cannot pay interest, away from the zero lower bound its (real) balance sheet is limited by the demand for money. Furthermore, if securities are not marked to market and the central bank holds its bonds to maturity, it is impossible for the CB to make losses, and it always obtains profits from being a monopoly provider of money. When the option of paying interest on liabilities is allowed, the limit on the CB's balance sheet is lifted. In this case, the CB is free to take on interest‐rate risk – for example, by buying long‐term securities and financing those purchases with short‐term debt that pays the market interest rate. This is a risky enterprise that can lead to additional profits but also to losses. To the extent that losses exceed the profits of the monopoly operations, the CB faces two options: either it is recapitalised by Treasury or it increases its monopoly profits by raising the inflation tax.     

Interest rate level and stock return predictability

We employ a novel interest rate‐determined model‐switching strategy to forecast stock returns and find persistent predictive ability among a number of economic fundamentals. This strategy switches predictive models based on whether a real‐time interest rate is higher than the mean level interest rate of a look‐back period. The robustly better predictive ability of the new strategy relative to the original OLS regressions suggests that stock returns react more rationally to the variation in economic fundamentals if the contemporaneous interest rates are high. This pattern is consistent with prior literature demonstrating that a high interest rate attenuates speculative demand (Keynes, The general theory of employment, interest, and money, Harcourt Brace, London, 1936), while speculative trading drives stock prices away from their valuation founded on economic fundamentals (Scheinkman & Xiong, Journal of Political Economy, 111, 1183, 2003).     

基于ARMA模型的银行间质押式回购利率的实证研究

银行间质押式债券回购是目前我国货币市场交易最为活跃、成交金额最大的品种,其利率已经成为货币市场的代表性利率,同时也是我国短期金融产品定价的利率基准之一。本文试图寻找影响银行间债券市场回购利率的重要因素,并通过建立自回归移动平均模型,研究各种宏观经济与金融市场变量对该利率的影响。     

On the choice of immediate monetary targets

This paper studies the control problem of a stochastic monetary system. The Central Bank has the choice of two targets: the size of its portfolio of assets or the level of interest rate on that class of assets. If its objective is to minimize the variance of a monetary aggregate or of private sector interest rate, the conditions under which one or the other of the targets should be used are analyzed. However, if the ultimate objective is a minimum variance in a desired GNP level the effect of the immediate target is the same whether the central bank employs a money stock or a private interest rate target.     

中国化泰勒规则的构建与规则利率的估算——基于考虑金融周期信息的潜在产出与自然利率的再估算

我国货币政策正在向价格型调控方式转型,有必要探索符合我国实际的泰勒规则以确定政策利率目标水平,而如何科学合理地估算潜在产出和自然利率是关键。本文对构建多目标下的中国化泰勒规则时应考虑的因素作了深入探讨,并将金融周期信息纳入我国潜在产出的测算,同时采用基于潜在产出的方法对自然利率进行估算,进而分不同情形尝试估算我国的规则利率水平。结果表明,考虑金融周期信息后的潜在产出在金融扩张期将低于传统方法的估计结果,可为政策制定者有效应对经济运行的过热现象或泡沫化状态提供参考;无论是基于何种潜在产出和自然利率的测算组合,将国内外利差、房价涨幅偏离经济增长程度纳入中国化泰勒规则的构建均是合理的;不同情形下估算的规则利率走势,自2004年以来与货币市场利率走势均较为相近,且2013年后随着利率市场化改革的快速推进,差距呈明显缩小态势,但2017年下半年至2018年期间,受国际宏观形势和国内因素影响,估算的规则利率均快速上扬,与货币市场利率走低形成反差。