我国商业银行规模经济和范围经济的实证研究

本文利用广义超越对数成本函数,分组研究了我国14家商业银行2001—2010年的面板数据,结果表明:股份制商业银行的总体规模经济略好于国有控股商业银行,但在贷款特定产出规模经济方面要逊于国有控股商业银行;国有控股商业银行的范围经济要好于股份制商业银行,在特定产出范围经济方面,贷款与存款、投资与存款存在成本互补,贷款与投资存在较轻程度的范围不经济。     

Financial Deregulation and Economies of Scale and Scope: Evidence from the Major Australian Banks

In this study a parametric approach employing a flexible translog functional model is used to estimate economies of scale and scope in the four major Australian banks (ANZ, NAB, CBA and WESTPAC). Two hypotheses are tested to determine whether bank economies of scale have changed and also whether economies of scope were exhausted following financial deregulation. The analysis reveals that there is evidence for a continuing difference in banks' economies of scale as a result of deregulation. The empirical evidence also suggests that economies of scope were not exhausted by financial deregulation. In addition, there is continuing evidence of considerable economies of scope in the four major banks. In other words, Australian banks have not fully embraced deregulation and adjusted their joint production in a cost efficient manner. Findings in this study indicate that further deregulation would create a more competitive and efficient banking environment in Australia.     

Too Big to Be Efficient? The Impact of Implicit Subsidies on Estimates of Scale Economies for Banks

We examine whether “too‐big‐to‐fail” (TBTF) factors affect estimates of scale economies for large banks. From a standard model of bank production that does not control for any TBTF factors, we find evidence of scale economies for our sample of large banks. We then control for TBTF factors by using a measure of the “implicit subsidy” that emerges from a reduction in TBTF banks’ funding costs due to investor expectations of government support. We do this in two ways: first, we estimate scale economies from an augmented model of bank production that employs a proxy for the counterfactual price of debt that banks would face in the absence of any TBTF funding cost advantage; second, we estimate scale economies from a model of bank production that is estimated only for a sample of banks considered unlikely to be TBTF. After controlling for TBTF factors using either method, we no longer find evidence of scale economies for our sample of large banks. These results suggest that estimated scale economies for large banks are affected by TBTF factors.     

Branching restrictions and banking costs

Previous research of banking costs has been limited by the choice of the functional form, irregularities in the estimated cost functions, and a failure to rigorously examine the difference between banks in branching states and banks in unit-banking states. This paper addresses these shortcomings. Banks are modelled as three-input-three-output cost minimizing firms. A three equation system is estimated using 1985 Functional Cost Analysis data. The findings indicate that banks in unit-banking states experience diseconomies of scale Banks in branching states experience diseconomies of scale at the bank level but economies of scale at the branch level. We also find evidence of economies of scope for branch-state banks but not for unit-state banks.     

Competitive viability in banking : Scale, scope, and product mix economies

Conventional scale and scope economies are inadequate to determine the competitive viability of banks that vary in scale and product mix simultaneously. This paper develops two new and more general measures of multi-product economies. Slight diseconomies of scale and product mix are found for banks, usually on the order of 1 to 3 percent, which may be due to demand-side influences. These are robust to differing cost and output specifications, organizational levels, and competitive environments. These results differ from other banking studies that found scope economies, a conflict that may be due to methodological difficulties.     

Winners and Losers as Financial Service Providers Converge: Evidence from the Financial Modernization Act of 1999

The Financial Modernization Act of 1999 dramatically increased insurers' and investment banks' authority to provide an array of financial services and allowed commercial banks to offer investment banking and insurance services. In this paper we examine the market response to this legislation. We find a strong positive response among insurance companies and investment banks, and no significant response among commercial banks. Larger institutions in all three financial sectors earn higher abnormal returns. Additionally, better performing banks earn higher abnormal returns. Our results suggest that allowing financial convergence can add value through synergies and that large players are needed to exploit the scope economies.     

The composite cost function and efficiency in giant Japanese banks

This study provides further empirical investigation, in the context of giant Japanese banks, of the recent claim by Pulley and Braunstein (1992, A composite cost function for multiproduct firms with an application to economies of scope in banking, Review of Economics and Statistics 74, 221–230), that their new composite model for the multiproduct cost function has important advantages over the separable quadratic, generalized translog and standard translog models. In addition to assessing the composite model's relative ability in measuring global scope and scale economies, the study also extends the P-B analysis to assess measurement of product-specific scope and scale economies, pairwise cost complementarities between outputs, changes in the marginal costs of outputs and technological change. The results appear to confirm P-B's chain. The persistent finding of scale economies for large Japanese banks is also investigated and confirmed.     

Are European banks too big? Evidence on economies of scale

In light of the policy debate on too-big-to-fail we investigate evidence of economies of scale for 103 European listed banks over 2000–2011. Using the Stochastic Frontier Approach, the results show that economies of scale are widespread across different size classes of banks and are especially large for the biggest banks. At the country level, banks operating in the smallest financial systems and the countries most affected by the financial crises realize the lowest scale economies (including diseconomies) due to the reduction in production capacity. As for the determinants of scale economies, these mainly emanate from banks oriented toward investment banking, with higher liquidity, lower Tier 1 capital, those that contributed less to systemic risk during the crises, and those with too-big-to-fail status.     

中国银行业规模经济和范围经济的实证研究——基于复合成本函数的分析

本文首次在国内利用复合成本函数估计我国国有商业银行和股份制商业银行1998——2003年的成本函数,并计算出各自的规模经济和范围经济。复合成本函数把投入价格的对数二次项和产出的二次项结合起来,具有优良的实证研究性质。实证研究结果表明:时间对我国银行业的规模经济和范围经济影响不显著;国有商业银行和股份制商业银行都存在着轻微的规模不经济和范围不经济,国有银行略好于股份制银行。我国商业银行的两种产出——存款和贷款不存在成本互补性。     

Who said large banks don’t experience scale economies? Evidence from a risk-return-driven cost function

The Great Recession focused attention on large financial institutions and systemic risk. We investigate whether large size provides any cost advantages to the economy and, if so, whether these cost advantages are due to technological scale economies or too-big-to-fail subsidies. Estimating scale economies is made more complex by risk-taking. Better diversification resulting from larger scale generates scale economies but also incentives to take more risk. When this additional risk-taking adds to cost, it can obscure the underlying scale economies and engender misleading econometric estimates of them. Using data pre- and post-crisis, we estimate scale economies using two production models. The standard model ignores endogenous risk-taking and finds little evidence of scale economies. The model accounting for managerial risk preferences and endogenous risk-taking finds large scale economies, which are not driven by too-big-to-fail considerations. We evaluate the costs and competitive implications of breaking up the largest banks into smaller banks.     

基于广义超越对数成本函数的商业银行范围经济实证研究

从业务收益变化的角度,通过构建商业银行广义超越对数成本函数的面板固定效应模型及范围经济的测度方程,对中国不同类型商业银行1997～2006年的范围经济进行实证和对比分析得出:从整体上看,中国商业银行呈现范围经济效应,但中国商业银行的范围经济还没有达到最佳的状态;范围经济与商业银行中间业务及投资业务的发展有关,股份制商业银行的范围经济优于国有商业银行.     

Regularity conditions and scope estimates: The case of large-sized U.S. banks

We consider economies and diseconomies of scope for large U.S. banks by employing ordinary and hybrid translog cost functions. We examine the regularity conditions in output space where scope estimates are calculated and reject all models for which these conditions fail. The translog model always possesses violations. For the hybrid translog, violations occur in every case except one. In this one case, we find economies of scope.     

Intra-industry signals embedded in bank acquisition announcements

Bank acquisitions have increased in recent years, as more banks attempt to exploit potential synergies, economies of scale, and other benefits. Numerous studies have determined that bank acquisitions generate strong positive valuation effects for targets on average, while the evidence of the impact on acquirers is mixed. Our objectives are: (1) determine whether the announcement of a bank acquisition transmits intra-industry signals; (2) explain why the intra-industry effects vary across acquisition announcements; and (3) explain why the valuation effects of individual rival banks vary. We find that bank acquisition announcements generate significant positive intra-industry effects, on average.The intra-industry effects of rival bank portfolios are not uniform across announcements, as they are conditioned by variables that could signal information about the probability that rival banks will become takeover targets. The valuation effects of rival bank portfolios are positively related to the valuation effects of the target banks, and inversely related to the size and prior performance of rival bank portfolios. Furthermore, the valuation effects are more favorable for individual rival banks that are ultimately acquired. To the extent that these variables reflect the probability of being acquired in the future, the intra-industry effects appear to be more favorable for acquisitions in which there is a higher probability that the corresponding rivals will become targets. Overall, investors discriminate based on event-specific and rival bank-specific characteristics when interpreting the signal transmitted as a result of bank acquisitions.     

The efficiency and the conduct of European banks: Developments after 1992

We assess the efficiency of the European banking sector in the 5-year period following the implementation of the Second Banking Directive of the European Union (EU). We first determine the degree of cost efficiency of EU banks in 1993-1997. After that, we explore to what extent efficient European banks are managed differently than their inefficient peers. Our datasets comprise 5 years of observations on 1347 savings and 873 commercial banks. We use the new recursive thick frontier approach (RTFA) method to establish our results. We find that structural factors, such as technological progress or increased bank competition, have lowered the cost base of banks by about 5% annually during the sample period. Managerial inability to control costs (X-inefficiency) is with 17-25% the main source of bank inefficiency in the EU. Managerial efficiency varies a great deal within Europe, and there seems to be no tendency towards convergence. We find that small savings banks can exploit economies of scale. The EU savings bank sector would cut costs by about 3% if small savings banks merged.     

Technological and Regulatory Forces in the Developing Fusion of Financial-Services Competition

Product lines of traditionally heterogeneous financial institutions are rapidly fusing into a homogeneous blend. Institutions and market structures are reshaping themselves to lower the cost of serving customer demand for financial services. This paper contends that contemporary adaptations exploit scope economies rooted in technological change and deposit-insurance subsidies to innovative forms of risk-bearing. As they reorient work flows, financial firms are simultaneously restructuring their organizations to lower net burdens from government regulation. Alternative state and federal regulatory and legislative bodies compete vigorously for the regulatory business of developing institutional hybrids. Evolution of Federal Reserve policy toward “nonbank banks” exemplifies the process.     

What determines the profitability of banks? Evidence from Spain

This paper empirically analyses the factors that determine the profitability of Spanish banks for the period of 1999–2009. We conclude that the high bank profitability during these years is associated with a large percentage of loans in total assets, a high proportion of customer deposits, good efficiency and a low doubtful assets ratio. In addition, higher capital ratios also increase the bank’s return, but only when return on assets (ROA) is used as the profitability measure. We find no evidence of either economies or diseconomies of scale or scope in the Spanish banking sector. Finally, our study reveals differences in the performance of commercial and savings banks.     

股权融合下的中国银行保险新发展：理论与实证

中国银行保险的股权融合发展至今,形式不断多样,从借道香港、参与IPO认购、参股入股到直接并购;主体不断增多,不同规模、不同性质的银行与保险公司均有参与。这一现象既可以用规模经济、范围经济和内部资本市场等理论加以解释,又是国内银行与保险公司在监管政策的推动下出于财务投资或战略投资的现实决策。采用事件研究法以“平深恋”为例...     

基于TCF函数的中国城市商业银行规模经济探究

通过收集52家城商行年度报告数据,建立超越对数成本函数（TCF）,得出规模经济系数,进而判断我国城商行的规模经济效应。同时,建立规模因子与资产规模的散点图,得出城商行的规模经济变动趋势,并据此分别得出不同资产规模的城商行发展战略。     

Correspondent services and cost economies in commercial banking

Prior bank cost function studies have ignored the fact that some banks obtain a substantial amount of services from their correspondents. If these services are paid for with compensating deposit balances, their cost to the purchasing bank is not reflected in standard expense reports. This paper investigates whether explicit consideration of theese correspondent costs materially affects estimated bank returns to scale. The results indicate that the level of banksoperating costs is underreported by as much as 15%. While scale economy estimates for unit banks are not significantly affected by the addition of correspondent service costs, prior studies have overestimated branch bank scale economies by a small but statistically significant amount.     

我国银行业改革与引进外资的开放竞争策略

针对我国银行业面临的问题和外资银行进入后的竞争压力,本文通过分析几种不同改革思路后认为,我国银行业改革的核心问题是产权和公司治理,两者紧密相连,产权改革是为了获得良好的公司治理,私有化和引入外资都是可供选择的产权改革方式之一,理论上不存在何者更优.国有商业银行改革的关键在于改变国有独资所有权结构为多元投资结构,可供选择的方案有不改变所有权性质的多个国有投资主体的单一所有制和引进包括国有、民营、外资参股的多元所有制.鉴于我国银行业目前的特点,外资参股并不是一种最优的选择,引进外资银行的正确策略是:独资优于合作,合作优于合资.