我国商业银行业务多元化、经营绩效与风险相关性研究

本文引入Herfindahl指数衡量银行业务结构多元化程度,通过建立多元化绩效、多元化风险以及风险—绩效模型,运用2000-2010年间我国19家主要商业银行的面板数据,对商业银行收入结构多元化、经营绩效以及风险的关系进行了系统的分析。研究发现,多元化有效降低了银行的风险,但是其对绩效影响并不明显,银行绩效的改善主要还是来自近年的产权改革、引进外资等治理机制上的变化,以及银行资产规模扩张带来的规模经济效应。这一结论对于我国银行业的进一步改革具有重要的借鉴意义。     

Should cross-border banking benefit from the financial safety net?

Using bank-level data from 84 countries, we find that a higher degree of bank internationalization is associated with higher interest expenses. Internationalization is proxied by a bank's share of foreign liabilities in total liabilities or a Herfindahl index of international liability concentration. Bank interest expenses rise relatively more with internationalization if the bank is underperforming or headquartered in a country with weak public finances, and especially at times of weak world output growth. These results suggest that liability holders of distressed internationalized banks expect less from the financial safety net since lack of an efficient recovery and resolution regime for international banks can make their insolvency very costly to deal with.     

Depositors’ trust: Some empirical evidence from Indonesia

We develop a comprehensive index, based on Robbins and Judge’s (2008) five dimensions of trust, to measure depositors’ trust in individual banks as well as trust in the banking industry and financial safety net. Using a survey of 992 retail depositors in Indonesia, we find that trust in individual banks where depositors save their money is greater than trust in the overall banking industry and financial safety net. We also find that depositors’ trust is affected by personal characteristics—for instance, women and older depositors have relatively less trust. Depositors tend to put their trust in individual banks and the financial system if they have greater trust in information conveyed by the government. Religious and economic values have positive effects on depositors’ trust at both the micro and macro levels. Our results also document that risk-taking behavior is positively associated with depositors’ trust. Furthermore, we find that more-educated depositors have significantly less trust. This finding might imply that the erosion of market discipline by depositors in a country with relatively generous deposit insurance, such as Indonesia, can be mitigated through greater financial literacy.     

A Measure of Competition Based on 10‐K Filings

In this paper we develop a measure of competition based on management's disclosures in their 10‐K filing and find that firms’ rates of diminishing marginal returns on new and existing investment vary significantly with our measure. We show that these firm‐level disclosures are related to existing industry‐level measures of disclosure (e.g., Herfindahl index), but capture something distinctly new. In particular, we show that the measure has both across‐industry variation and within‐industry variation, and each is related to the firm's future rates of diminishing marginal returns. As such, our measure is a useful complement to existing measures of competition. We present a battery of specification tests designed to explore the boundaries of our measure and how it varies with the definition of industry and the presence of other measures of competition.     

Are Competitive Banking Systems More Stable?

Using the Panzar and Rosse H-statistic as a measure of competition in 45 countries, we find that more competitive banking systems are less prone to experience a systemic crisis and exhibit increased time to crisis. This result holds even when we control for banking system concentration, which is associated with higher probability of a crisis and shorter time to crisis. Our results indicate that competition and concentration capture different characteristics of banking systems, meaning that concentration is an inappropriate proxy for competition. The findings suggest that policies promoting competition among banks, if well executed, have the potential to improve systemic stability.     

Should banks be geographically diversified? Empirical evidence from cross-country diversification of European banks

Using a sample of European bank, this paper investigates the impact of banks' geographic diversification on their cost of equity capital. Examining the geographic diversification of European banks gives an insight on the value of cross-border banking. To measure diversification between major geographic areas in which the bank operates, the Herfindahl–Hirschman Index, based on revenues generated at home and abroad is constructed for each bank. To address the problem of endogeneity, system generalized method of moments estimator is used. The main finding of the analysis is that, other things equal, more geographic diversified banks have higher cost of equity capital than geographically focused ones. This result implies that the adverse market valuation effect of geographic diversification (increase in agency problem) dominates the positive ones (increase in efficiency and reduction in risk).     

Bank concentration,competition, and crises: First results

Motivated by public policy debates about bank consolidation and conflicting theoretical predictions about the relationship between bank concentration, bank competition and banking system fragility, this paper studies the impact of national bank concentration, bank regulations, and national institutions on the likelihood of a country suffering a systemic banking crisis. Using data on 69 countries from 1980 to 1997, we find that crises are less likely in economies with more concentrated banking systems even after controlling for differences in commercial bank regulatory policies, national institutions affecting competition, macroeconomic conditions, and shocks to the economy. Furthermore, the data indicate that regulatory policies and institutions that thwart competition are associated with greater banking system fragility.     

What determines output losses after banking crises?

We examine the output costs associated with 150 banking crises using cross country data for years after 1970. Many banking crises do not lead to contractions and most banking crises do not lead to large contractions, a result that holds for developed and developing economies. We examine which variables help to predict output changes after a banking crisis using Bayesian Model Averaging. For developed economies, we find that the output losses are positively related to prior economic conditions such as credit growth. For low-income economies, we find that other factors such as having a stock market and deposit insurance are more important.     

Social Concentration on Boards,Corporate Information Environment and Cost of Capital

Prior evidence on the relationship between demographic diversity in corporate boards and firm performance is mixed. Some studies have found that the relationship between board attributes and firm performance is driven by a firm's information environment. This study examines whether corporate transparency also impacts the relationship between gender and ethnic diversity of directors and firm performance. To test this hypothesis, I use a Herfindahl Index based on directors’ gender and ethnicity to measure board diversity, and an opacity index based on analyst following, analyst forecast error, bid‐ask spread, and share turnover to measure corporate transparency. I find that the cost of capital is positively associated with social concentration on corporate boards and that this premium is larger for highly opaque firms. In further analysis, I find that the interaction of corporate information environment and social concentration on boards is more important for operationally complex firms. Compared with simple firms, operationally complex firms pay a greater premium on their capital if they have a socially concentrated board and an opaque information environment.     

On measuring concentration in banking systems

Assuming a Pareto-type distribution of bank sizes, we investigate the effect of changes in Zipf's exponent () and the sample size on the behavior of different concentration indices, such as the 3-bank concentration ratio, the Herfindahl–Hirschman index and the top 5%-concentration ratio. We derive analytical relations between these concentration indices and investigate the elasticity of these indices to changes in and in the sample size N. We show different regimes under which each index can be used most appropriately. Our results are highly relevant for policymakers who rely on such concentration measures to derive public policy recommendations in banking.     

Macroprudential policies,capital flows,and the structure of the banking sector

Using a large sample of advanced and emerging market economies over the period 1999–2012, we examine the effectiveness of macroprudential policies (MPPs) in managing cross-border bank flows. Conditioning on the structure of the banking sector in the MPP-implementing country, we find that higher regulatory quality and a higher credit-to-deposit ratio increase the effectiveness of MPPs, while a higher cost-to-income ratio has the opposite effect. If all three financial variables are evaluated at the median, the marginal effect of our preferred MPP measure leads to a reduction of international bank inflows in percent of GDP by around half a percentage point and is only marginally significant. However, when the more enhanced 25th (10th) percentiles of their respective distributions are considered, we observe, as a response to the same MPP measure, a reduction of bank inflows by 3.44 (5.39) percentage points that is highly statistically and economically significant. Additionally, we find that the structure of the domestic banking sector determines spillovers from MPPs across asset classes, while spillovers from MPPs across countries are a function of banking sector conditions both at home and abroad.     

中外商业银行在零售业务领域的竞争力分析

本文首先分析了外资银行在中国的发展进程,接下来从网点、产品、客户服务等方面对全面开放后中外商业银行在零售业务领域的竞争力进行了对比分析,揭示了我国商业银行在发展零售业务中的短板所在,最后结合我国金融业发展的实际情况,从明确零售业务发展定位、加强零售业务产品创新、全面提升个人金融业务服务层次等方面提出了我国商业银行应对当前外资银行巨大竞争压力的几点对策。     

我国投资银行业市场结构、规模与绩效实证研究

本文的实证研究表明,市场结构、行业规模以及市场整体收益率对我国投资银行业的利润率有着很强的解释能力,三个因素对于净资产收益率的解释能力超过98%。从影响的相对水平来看,集中度的影响要大于市场收益的影响,规模的影响与集中度、市场收益的影响相反。进一步研究还表明,尽管行业资产规模与净资产收益率的时间序列显示随着行业资产规模的增加,我国证券公司的净资产收益率呈现出不断下降的特征,但这并不意味着我国投资银行业是规模不经济的。有关规模经济的横截面分析数据表明,现阶段我国证券公司的规模与其绩效之间并不存在着明显的关系,既没有显示出规模不经济,也没有显示出规模经济。     

基于动态因子Copula模型的我国银行系统性风险度量

本文基于2007年至2019年我国14家上市银行的股票收益率,构建偏态t-分布动态因子Copula模型,利用时变荷载因子刻画单家银行与整个系统的相关性,计算联合风险概率作为系统性风险整体水平的度量,基于关联性视角提出了新的单家机构系统脆弱性和系统重要性度量指标——系统脆弱性程度和系统重要性程度。该方法充分考虑了银行个体差异性和系统的内在关联性以及收益率的厚尾性和非对称性,从而能够捕捉到更多的信息且兼具时效性。研究表明:银行机构在风险聚集时期相关程度更大,联合风险概率能够准确识别出系统性风险事件且在我国推行宏观审慎评估体系以后有明显降低;整体而言,大型商业银行系统重要性水平最高,同时风险抗压能力也最强;本文使用的度量方法降低了数据获取成本且更具时效性,有助于为宏观审慎差异化监管工作提供借鉴和参考。     

Technological and Environmental Differences in the European Banking Industries

This paper analyzes the productive differences of banking among countries. It proposes a Malmquist type index that allows intercountry productivity differences to be broken down into pure technological differences and differences due to environmental effects. The most relevant feature of this index is its symmetry, since it avoids the problem of measurements being sensitive to the choice of the benchmark country. This index is used to explain the productivity gaps of banking industries across four major countries in Europe as well as the productivity gains that banks could obtain using alternative technologies or with different environments. An output distance function is defined and the stochastic frontier approach used to carry out the comparison.     

基于动态因子Copula模型的我国银行系统性风险度量

本文基于2007年至2019年我国14家上市银行的股票收益率,构建偏态t-分布动态因子Copula模型,利用时变荷载因子刻画单家银行与整个系统的相关性,计算联合风险概率作为系统性风险整体水平的度量,基于关联性视角提出了新的单家机构系统脆弱性和系统重要性度量指标——系统脆弱性程度和系统重要性程度。该方法充分考虑了银行个体差异性和系统的内在关联性以及收益率的厚尾性和非对称性,从而能够捕捉到更多的信息且兼具时效性。研究表明:银行机构在风险聚集时期相关程度更大,联合风险概率能够准确识别出系统性风险事件且在我国推行宏观审慎评估体系以后有明显降低;整体而言,大型商业银行系统重要性水平最高,同时风险抗压能力也最强;本文使用的度量方法降低了数据获取成本且更具时效性,有助于为宏观审慎差异化监管工作提供借鉴和参考。     

中国银行业市场结构演变的金融稳定效应研究

银行业市场结构模式到底是“集中-稳定”还是“集中-脆弱”观点尚未达成一致,但是通过采用熵值分解指数来刻画我国银行业市场结构可以针对该问题给出较为合理的答案。研究结果表明,我国银行业市场结构的集中程度与风险之间的关系是负相关的,我国较高的银行业市场集中度,某种程度上提高了我国银行业体系的稳定程度。     

Sovereign-bank linkages: Quantifying directional intensity of risk transfers in EMU countries

This study attempts to identify and trace inter-linkages between sovereign and banking risk for each main country in the euro area. To this end, we use an indicator of banking sector risk in each country based on the Contingent Claim Analysis literature, and 10-year government yield spreads over Germany as a measure of sovereign risk. We apply a dynamic approach to test for Granger causality between the two measures of risk in each country, allowing us to check for episodes of significant and abrupt increase in short-run causal linkages. The empirical results indicate that episodes of causality intensification vary considerably in both directions over time and across the different EMU countries. The directionality suggests the presence of causality intensification, mainly from banks to sovereigns in crisis periods.     

Employee perceptions of market orientation in the banking industry: A case from a developing country

The importance of this study stems from the desire to measure the market orientation of banks in a developing country such as Ghana, where the concept of market orientation is still a new practice. Specifically, the study was meant to investigate employee perceptions of market orientation and how they differ in relation to employment status within a bank in a developing country. A slightly modified questionnaire based on Kohli, Jaworski and Kumar's market orientation scale (MARKOR) was used. The outcome of the study reveals that the MARKOR scale provides a good measure of market orientation in the Ghanaian banking environment. Although the general perception of market orientation is somewhat moderate, the findings further reveal that the management of the bank has a higher perception of market orientation than employees. Some recommendations have been provided for Ghanaian banks and their counterparts in other developing countries on the need for them to be market oriented.     

The effect of the PricewaterhouseCoopers merger on auditor concentration in Australia: A note

Concerns have been raised about the impact of the PricewaterhouseCoopers (PwC) merger on the structure of and competition in the audit and assurance services market in Australia. The market share of publicly listed companies for audit firms for each industry category pre– and post–merger is examined in this paper to ascertain levels of auditor concentration. Using the approach outlined by the Australian Competition and Consumer Commission a decrease in the level of competition is identified. However, when using another generally accepted concentration measure, the Herfindahl Index, the merger is found to not necessarily decrease competition. In fact, for a number of industry sectors a more equitable spread of clients between the main audit firms was achieved.