Optimal Monetary Policy and Transparency under Informational Frictions

This paper examines the optimal monetary policy and central bank transparency in an economy where firms set prices under informational frictions. The economy is subject to two types of shocks determining the efficient output level and firms' desired markups. To minimize the welfare‐reducing output gap and price dispersion between firms, the central bank controls firms' incentives and expectations by using a monetary instrument and disclosing information on the realized shocks. This paper shows that an optimal policy comprises the disclosure of a linear combination of the two shocks and the adjustment of monetary instruments contingent on the disclosed information.     

Optimal monetary policy with imperfect common knowledge

This paper determines optimal nominal demand policy in a flexible price economy in which firms pay limited attention to aggregate variables. Firms’ inattentiveness gives rise to idiosyncratic information errors and imperfect common knowledge about the shocks hitting the economy. This is shown to have strong implications for optimal nominal demand policy. In particular, if firms’ prices are strategic complements and economic shocks display little persistence, monetary policy has strong real effects, making it optimal to stabilize the output gap. Weak complementarities or sufficient shock persistence, however, cause price level stabilization to become increasingly optimal. With persistent shocks, optimal monetary policy shifts from output gap stabilization in initial periods following the shock to price level stabilization in later periods, potentially rationalizing the medium-term approach to price stability adopted by some central banks.     

Observing and Shaping the Market: The Dilemma of Central Banks

While the central bank observes market activity to assess economic fundamentals, it shapes the market outcome through the conduct of monetary policy. A dilemma arises from this dual role because the more the central bank shapes the market, the more it influences the informational content of market outcomes. This paper analyzes how accounting for the endogeneity of information affects optimal monetary policy. By reducing the accuracy of central bank information, endogenous information calls for a higher degree of opacity, weakens accommodation policy to shocks, and broadens the range of parameters for which taking a signaling action is detrimental to welfare.     

Optimal monetary policy with the cost channel

In the standard new Keynesian framework, an optimizing policy maker does not face a trade-off between stabilizing the inflation rate and stabilizing the gap between actual output and output under flexible prices. An ad hoc, exogenous cost-push shock is typically added to the inflation equation to generate a meaningful policy problem. In this paper, we show that a cost-push shock arises endogenously when a cost channel for monetary policy is introduced into the new Keynesian model. A cost channel is present when firms’ marginal cost depends directly on the nominal rate of interest. Besides providing empirical evidence for a cost channel, we explore its implications for optimal monetary policy. We show that its presence alters the optimal policy problem in important ways. For example, both the output gap and inflation are allowed to fluctuate in response to productivity and demand shocks under optimal monetary policy.     

货币政策冲击对实体企业投资选择影响的“宿醉效应”

本文研究货币政策冲击对实体企业投资选择的动态影响效应。与传统分析方法不同,本文运用利率衍生品价格数据来识别中国货币政策冲击,利用工具变量局部投影法获得货币政策冲击对微观实体企业投资选择的动态影响效应。研究表明,动态效应呈现出更丰富的信息:货币政策冲击对企业金融资产占比有显著驱动效应,效应大小表现出先升后降趋势,在冲击发生一年半后达到峰值。值得注意的是,货币政策冲击会导致企业货币资金占比在短期内显著减少,而在中长期显著增加。进一步分析表明,货币政策冲击使实业投资和金融投资在短期内都更有利可图,所以在短期内企业倾向于减少货币资金占比,增加非货币金融资产投资和实业投资;政策冲击在中长期对企业资产收益率的提升作用消退,盈余效应使企业在中长期的金融资产占比提高,表现出一定的“宿醉效应”。     

耐用品、投资专有冲击与货币政策福利

本文构建蕴含耐用品与非耐用品的两部门DSGE模型,研究投资专有冲击对货币政策及社会福利的影响。投资专有技术进步改进了投资转化为生产资本的效率,放大边际成本波动,增加了厂商调价动机和价格水平变动。即使耐用品价格完全灵活,最优货币政策也无法同时稳定价格和实际GDP。研究发现:(1)耐用品相对价格缺口波动率的上升虽然增加了实际GDP波动,但能够有效地降低投资专有技术对边际成本的冲击,减少价格变动的福利损失。所以两部门投资专有冲击时,央行倾向于稳定价格水平。与其相反,在单部门投资专有冲击和两部门生产技术冲击时,最优货币政策应降低耐用品相对价格缺口波动,稳定实际GDP。(2)对比三种泰勒规则:钉住非耐用品PPI、钉住加权平均PPI及钉住CPI,福利分析发现钉住非耐用品PPI最优,钉住CPI次之,钉住加权平均PPI的福利损失最大。就损失程度而言,投资专有冲击的福利损失是生产技术冲击的2倍,表明投资专有冲击加剧了最优货币政策在稳定价格与实际GDP间的权衡。     

经常账户冲击、资本账户管理与中央银行货币政策操作

经常账户负向冲击及引发的宏观变量联动性通常对各经济体央行货币政策操作构成挑战。本文构建了融入经常账户冲击的小型开放经济DSGE模型,比较了采取不同资本账户管理工具(数量型和价格型)情景下,央行执行数量型货币政策规则、盯住CPI通胀泰勒规则、盯住PPI通胀泰勒规则下,经常账户负向冲击对货币政策操作的异质性影响及传导机制,并进行了福利分析。主要结论如下：第一,经常账户负向冲击将对本国央行货币政策操作构成一定影响;第二,资本账户管理可以成为缓冲经常账户负向冲击的防火墙,价格型资本账户管理工具与盯住PPI通胀泰勒规则相结合造成的福利损失较小;第三,经常账户贸易端与收益端双重负向冲击对一国货币政策操作的影响更大,但公众预期到的经常账户恶化对货币政策操作的影响将有所减弱。本文认为,转型经济体央行应倾向于执行价格型货币政策规则,最优货币政策应在稳定价格水平与缓释风险方面进行权衡,适度降低对名义汇率的关注度,稳慎推进资本账户开放进程,并可优先选择价格型资本账户管理工具。     

The impact of monetary policy on the financing behaviour of firms in the Euro area and the UK

Abstract

According to the ‘broad credit view’ bank-dependent firms are more strongly affected by monetary contractions than firms with access to non-bank forms of external finance. Within the credit view the bank lending channel focuses on the special role of bank loans, and predicts that monetary contractions reduce loan supply to firms facing information problems. However, the ‘relationship lending channel’ argues that, especially in bank-based economies, bank-dependent firms have close ties with banks, which may reduce the sensitivity of their use of bank debt to monetary shocks. The sensitivity of corporate debt structures to changes in the monetary policy stance is analysed using a sample of 22,000 firms in the Euro area and the UK. Evidence is found for the credit view, the relationship lending channel, but not for the bank lending channel.     

Inflation and Welfare in a Competitive Search Equilibrium with Asymmetric Information

We study an economy characterized by competitive search and asymmetric information. Money is essential. Buyers decide their cash holdings after observing the contracts posted by firms and experience match-specific preference shocks which remain unknown to sellers. Firms are allowed to post general contracts. In the baseline model with indivisible goods, we show that, when the number of potential buyers is fixed, inflation decreases markups. This, in turn, increases aggregate output and ex ante welfare. When goods are divisible the negative effect of inflation on markups holds for unconstrained agents but is ambiguous for constrained agents. Still, optimal monetary policy implies a positive nominal rate. When there is buyers' free entry, asymmetric information causes a congestion effect that can be corrected by monetary policy.     

The Trade Credit Channel of Monetary Policy Transmission: Evidence from Nonfinancial Manufacturing Firms in Turkey

This study investigates the trade credit channel of monetary policy transmission in Turkey by using a large panel of corporate firms and includes detailed information on balance sheets and income statements of firms that regularly reported to the Central Bank of the Republic of Turkey during the period 1996-2008. The study suggests that the composition of external finance differs considerably across firm types based on size and export performance under tight and loose financial conditions. Small and medium-size manufacturing firms and firms with a low export share are less likely to have access to bank finance, especially in tight periods. In addition, financially constrained firms with limited access to bank finance (small, low-export-share firms) tend to substitute trade credits for bank loans more aggressively in tight periods as monetary policy tightens. The large volume of trade credit on firms' balance sheets and its positive response to contractionary monetary shocks imply that the trade credit channel might subdue the traditional credit channel of monetary transmission.     

Endogenous nominal rigidities and monetary policy

Recent empirical research finds that the degree of nominal rigidities varies over monetary policy regimes. This implies that monetary policy analysis with exogenously given nominal rigidities is subject to the Lucas critique. We allow firms to choose the probability of price adjustment in a Calvo-style sticky price model, and analyze how this probability changes according to an inflation coefficient of the Taylor rule. The model shows that a more aggressive monetary policy response to inflation makes firms less likely to reset prices and gives the resulting New Keynesian Phillips curve a flatter slope and a smaller disturbance, as observed during the Volcker-Greenspan era. Also, such a policy response can stabilize both inflation and the output gap by exploiting the feedback effects of this policy response on firms’ price-setting. These results offer theoretical support for the good policy hypothesis about the Great Moderation.     

Inflation targeting: What inflation rate to target?

In an economy with nominal rigidities in both an intermediate good sector and a finished good sector, and thus with a natural distinction between CPI and PPI inflation rates, a benevolent central bank faces a tradeoff between stabilizing the two measures of inflation, a final output gap and, unique to our model, a real marginal cost gap in the intermediate sector, so that optimal monetary policy is second-best. We discuss how to implement the optimal policy with minimal information requirement and evaluate the robustness of these simple rules when the central bank may not know the exact sources of shocks or nominal rigidities. A main finding is that a simple hybrid rule under which the short-term interest rate responds to CPI inflation and PPI inflation results in a welfare level close to the optimum, whereas policy rules that ignore PPI inflation or PPI sector shocks can result in significant welfare losses.     

Why are social network transactions important? Evidence based on the concentration of key suppliers and customers in China

Based on a new institutional economy framework, this study examines the formation and economic consequences of social networks (guanxi) from the perspective of key suppliers and customers in China. Results show that commercial activities which depend on networks are determined by the institutional environment. For example, companies that have lower accumulated social capital (less trust among people) and are subject to more government invention depend more on social network transactions than on the market. In addition, this study shows that network transactions can provide benefits to firms, especially in weak institutional environments. Networks can reduce transaction costs by reducing information asymmetry, i.e., increased network dependence is associated with lower credit costs and lower advertising and sales costs. Networks can also reduce the effect of industry shocks, especially negative shocks, by creating a bonding mechanism. This study contributes to our understanding of social networks in emerging markets by providing evidence on network transactions with key suppliers and customers and their influence on firms’ accounting behavior.     

The extensive margin and monetary policy

The creation of new firms, referred to as the extensive margin, is a significant but overlooked dimension of monetary policy. A monetary VAR documents that monetary policy has significant effects on firm creation. An analytically tractable model combining sticky prices and firm entry shows that entry alters the transmission of monetary policy innovations, acting much like a type of investment in more standard models. Monetary policy rules that offset the uncertainty of productivity shocks can raise the mean level of entry and thereby welfare, suggesting a new motivation for stabilization policy.     

Monetary Policy and Price Responsiveness to Aggregate Shocks under Rational Inattention

This paper studies a general equilibrium model that is consistent with recent empirical evidence showing that the U.S. price level and inflation are much more responsive to aggregate technology shocks than to monetary policy shocks. Specifically, we show that the fact that aggregate technology shocks are more volatile than monetary policy shocks induces firms to pay more attention to the former than to the latter. However, most important, this work adds to the literature by analytically showing how monetary policy feedback rules affect the incentives faced by firms in allocating attention. A policy rule responding more actively to inflation fluctuations induces firms to pay relatively more attention to more volatile shocks, helping to rationalize the observed behavior of prices in response to technology and monetary policy shocks.     

A Tale of Two Growth Engines: Interactive Effects of Monetary Policy and Intellectual Property Rights

How do intellectual property rights that determine the market power of firms influence the growth and welfare effects of monetary policy? To analyze this question, we develop a monetary hybrid endogenous growth model in which R&D and capital accumulation are both engines of long‐run economic growth. We find that monetary expansion hurts economic growth and social welfare by reducing R&D and capital accumulation. Furthermore, a larger market power of firms strengthens these growth and welfare effects of monetary policy through the R&D channel but weakens these effects through the capital‐accumulation channel. Therefore, whether the market power of firms amplifies or mitigates the welfare cost of inflation depends on the relative importance of the two growth engines. Finally, we calibrate the model using data in the United States and the Euro Area to quantitatively evaluate and compare the welfare cost of inflation in these two economies and find that the R&D channel dominates in both economies.     

Do foreign investors insulate firms from local shocks? Evidence from the response of investable firms to monetary policy

Extant research shows that stock returns of investable firms are highly sensitive to foreign market and global information shocks, suggesting that having foreign investors might insulate investable firms from shocks to local fundamentals. Examining 24 emerging markets, we find that both investable and non-investable firms are sensitive to local monetary policy shocks. This allays the concern that emerging-market opening reduces the efficacy of local monetary policy. We also find that in 11 countries (46% of our country-sample), investable firms are more sensitive to local shocks than non-investable firms. Differences in leverage, stock liquidity, size, domestic product-market exposure, or industry cyclicality do not drive this finding.     

Price‐Level Targeting and Stabilization Policy

We construct a dynamic stochastic general equilibrium model to study optimal monetary stabilization policy. Prices are fully flexible and money is essential for trade. Our main result is that if the central bank pursues a price‐level target, it can control inflation expectations and improve welfare by stabilizing short‐run shocks to the economy. The optimal policy involves smoothing nominal interest rates that effectively smooths consumption across states.     

The Credit Channel at the Zero Lower Bound through the Lens of Equity Prices

This study examines the impact of unconventional monetary policies on the stock market when the short‐term nominal interest rate is stuck at the zero lower bound (ZLB). Unconventional monetary policies appear to have significant effects on stock prices and the effects differ across stocks. In agreement with existing credit channel theories, I find that firms subject to financial constraints react more strongly to unconventional monetary policy shocks [especially large‐scale asset purchases (LSAPs)] than do less constrained firms. These results imply that the credit channel is as important as the interest rate channel in the transmission of unconventional monetary policies at the ZLB.     

Should a monetary policymaker look at money?

This paper examines whether monetary indicators are useful in implementing optimal discretionary monetary policy when the policymaker has incomplete information about the environment. We find that money does not contain useful information for the policymaker, if we calibrate the model to the U.S. economy. If money demand were to be appreciably less variable, observations on money could be useful in response to productivity shocks but would be harmful in response to money-demand shocks. We provide an incomplete information example where equilibrium welfare declines when the money-demand volatility decreases.