A note on cost structure and economies of scale in Greek banking

This note studies the Greek banking industry in 1980–1989 in order to estimate a representative cost structure functional form and search for economies of scale. The constructed model uses a translogarithmic cost function that includes the size of assets, capital, labor and technological progress. By using this model, which has been used by Benston et al. (1982), Hunter and Timme (1986) and others, we have been able to estimate for the first time an econometric form of the costs in Greek banking, and we have been able to investigate economies of scale in the Greek banking industry. Although operating-cost scale economies do exist, total-cost scale economies were not present. This has been shown through the utilization of a large sample of pooled data of all Greek banks for a period of ten years, and the use of two other samples of large and small banks. Moreover, by exploiting the properties of the model, we shall be able to show whether technological progress has been a factor which lowers bank costs.     

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.     

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.     

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.     

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。     

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.     

Post-crisis regulatory reforms and bank performance: lessons from Asia

Based on a large dataset from eight Asian economies, we test the impact of post-crisis regulatory reforms on the performance of depository institutions in countries at different levels of financial development. We allow for technological heterogeneity and estimate a set of country-level stochastic cost frontiers followed by a deterministic bootstrapped meta-frontier to evaluate cost efficiency and cost technology. Our results support the view that liberalization policies have a positive impact on bank performance, while the reverse is true for prudential regulation policies. The removal of activities restrictions, bank privatization and foreign bank entry has a positive and significant impact on technological progress and cost efficiency. In contrast, prudential policies, which aim to protect the banking sector from excessive risk-taking, tend to adversely affect banks’ cost efficiency but not cost technology.     

银行权益资本使用及其对规模经济测度的影响

将所有者权益的作用嵌入银行技术模型,测算中国十六家上市商业银行满足成本最小化时的所有者权益影子价格,并以成本最小化为标准评价权益资本使用情况。研究发现,五家国有大型商业银行持有高于最小化成本水平的所有者权益;其余大部分股份制商业银行的权益资本低于成本最小化要求。进一步测算规模经济,发现所有者权益进入成本方程后计算出的规模经济效应比仅以所有者权益为条件调节项和使用标准成本方程估计出的规模经济结果都要高,说明规模经济的轨迹将依赖于银行对负债与所有者权益相对信任度,即提高存款和所有者权益的相对成本及所有者权益资本以多大程度进入到成本函数设定中。     

Do foreign banks increase competition? Evidence from emerging Asian and Latin American banking markets

In this paper we examine the impact of foreign bank penetration on the competitive structure of domestic banking sectors in host emerging economies. We focus our analysis on Asia and Latin America during the period 1997-2008. Using bank-level panel data to identify foreign banks and to estimate measures of banking competition, we are able to provide robust empirical evidence that an increase in foreign bank penetration enhances competition in these host countries’ banking sectors. We find that this positive foreign bank penetration and banking competition link is associated with a spillover effect from foreign banks to their domestic counterparts. This spillover effect becomes stronger when more efficient and less risky foreign banks enter into less concentrated host country markets. We also find that the spillover effect is greater when foreign banks enter in the form of ‘de novo penetration’ than through mergers or acquisitions of domestic banks (‘M&A penetration’).     

Do local banking market structures matter for SME financing and performance? New evidence from an emerging economy

This paper investigates the relationship between local banking structures and SMEs’ access to debt and performance. Using a unique dataset on bank branch locations in Poland and firm-, county-, and bank-level data, we conclude that a strong position for local cooperative banks facilitates access to bank financing, lowers financial costs, boosts investments, and favours growth for SMEs. Moreover, counties in which cooperative banks hold a strong position are characterized by a more rapid pace of new firm creation. The opposite effects appear in the majority of cases for local banking markets dominated by foreign-owned banks. Consequently, our findings are important from a policy perspective because they show that foreign bank entry and industry consolidation may raise valid concerns for SME prospects in emerging economies.     

Efficiency and technical progress in banking Empirical results for a panel of German cooperative banks

Using 1989–1992 individual data of 757 German cooperative banks and applying the intermediation approach we specify a multi-product translog cost function for this part of the German banking industry. For all size classes moderate economies of scale can be identified. There is also evidence of economies of scope which supports the notion of universal banking. As for cost efficiency, we find that the average banks in all size classes deviate considerably from the best practice cost frontier. All banks enjoy growth of total factor productivity, which is higher for the smaller banks in the sample.     

Operational efficiency in banking: An international comparison

In this paper, we estimate a global cost function for international banks to test for both input and output inefficiencies. Our results for 1988–1992 suggest that for banks in 15 countries, the prevalence of input X-inefficiencies far outweighs that of output inefficiencies (as measured by economies of scale and scope). Moreover, our results suggests that the distribution-free model overestimates the magnitude of X-inefficiencies relative to the stochastic cost frontier approach.Large banks in separated banking countries (that prohibit the functional integration of commercial and investment banking) had the largest measure of input inefficiency amounting to 27.5 percent of total costs as well as significant levels of diseconomies of scale. All other banks have X-inefficiency levels ranging in the area of fifteen percent of total costs with slight economies of scale for small banks.     

Banking Mergers: The Impact of Financial Liberalization on the Taiwanese Banking Industry

The objective of this paper is to examine the nature of the Taiwanese banking sector and to analyze the impact of financial liberalization on the Taiwanese banking industry. We present empirical evidence to show that the recent wave of bank mergers observed in other countries is also suitable for Taiwan. Based on empirical results for overall economies of scale and expansion path subadditivity, Taiwanese banks should obtain the benefit of scale economies by merging with other banks rather than expanding by opening more branches. Furthermore, we show that the Relative Market Power hypothesis—which postulates that greater market shares lead to higher profitability—finds empirical support in Taiwanese banking data after financial reforms were enacted.     

Consolidation, scale economies and technological change in Japanese banking

The paper examines the technological structure of the Japanese banking sector before the onset of the banking crisis and structural reforms of the 1990s in order to shade light on the logic of the recent trend to consolidation in the industry. While diseconomies of scale are shown to be pervasive in the large banks, defying the rationale for consolidation, the paper presents evidence of an underlying technological progress that operates to significantly increase the industry's efficient minimum size, generating economies at larger banks, thus justifying the ongoing trend in consolidation. The results suggest that, to the extent that consumers can benefit from lower costs of bank production, policies that promote a more concentrated banking structure might be consistent with public interest.     

Are scale economies in banking elusive or illusive?: Evidence obtained by incorporating capital structure and risk-taking into models of bank production

This paper explores how to incorporate banks' capital structure and risk-taking into models of production. In doing so, the paper bridges the gulf between (1) the banking literature that studies moral hazard effects of bank regulation without considering the underlying microeconomics of production and (2) the literature that uses dual profit and cost functions to study the microeconomics of bank production without explicitly considering how banks' production decisions influence their riskiness.Various production models that differ in how they account for capital structure and in the objectives they impute to bank managers – cost minimization versus value maximization – are estimated using U.S. data on highest-level bank holding companies. Modeling the bank's objective as value maximization conveniently incorporates both market-priced risk and expected cash flow into managers' ranking and choice of production plans.Estimated scale economies are found to depend critically on how banks' capital structure and risk-taking are modeled. In particular, when equity capital, in addition to debt, is included in the production model and cost is computed from the value-maximizing expansion path rather than the cost-minimizing path, banks are found to have large scale economies that increase with size. Moreover, better diversification is associated with larger scale economies while increased risk-taking and inefficient risk-taking are associated with smaller scale economies.     

Bank interest rates and credit relationships in Italy

When evaluating the performance of a financial system in supporting the investment activity of the corporate sector, a distinction is usually drawn between “banking economies” and “market economies”, the former being characterized by long-term relations between banks and the industrial sector. Although theoretical studies and empirical results seem to agree that lending relationships increase the available quantity of capital to firms, they have little to say on the cost of bank credit: it is not clear whether a close relationship with a main bank would allow the borrower to pay a lower interest rate or expose him to a monopolistic rent. Using a unique data-set reporting detailed information on the evolution over time of individual bank–borrower relationships in Italy, we show evidence that a main bank provides credit at a lower cost and that some competition helps to reinforce the commitment between the borrower and the bank.     

Factor price misspecification in bank cost function estimation

Many studies of bank productivity implicitly assume that banks face imperfect factor markets in accessing labor and capital such that, in renting the same factor of production, at the same time, one bank will pay a price that will vary greatly from that of another bank. Usually, this implicit assumption is introduced by researchers’ simple expedience in calculating a factor price by dividing total cost attributable to a factor by the number of units rented. The range of factor prices so obtained, however, exceeds the reasonable bounds commonly observed in integrated factor markets. Our study contends that the wide variety of labor factor prices implicitly assumed is in fact a reflection of a variegated labor market and that the wide variety of financial capital costs is a reflection of incomplete specification of funds’ costs. We contend that, particularly in cross-sectional studies, it would generally be better for researchers to assume that banks faced competitive factor markets, thereby allowing the factor price term of cost functions to be eliminated. Not only would such elimination allow for a better estimate of true economies of scale and efficiency; it would also simplify greatly the estimation of many models. In this paper, we review briefly the significance of specifying factor prices in cost functions. Then we look at some actual factor prices that are reported in studies and used as inputs to cost function estimation. We conduct some simple tests to show what the reported factor prices in banking may actually represent. Having shown that factor prices reported are subject to misspecification, we estimate a set of cost functions with and without factor price specifications. We conclude by demonstrating that the improper specification of factor prices can affect inferences regarding measurement of inefficiency and returns to scale. Finally, we suggest methods by which these misspecifications may be rectified by use of time series, regional and international factor pricing data.     

The Banking Sector,Government Bonds,and Financial Intermediation: The Case of Emerging Market Countries

This paper develops an analytical framework to explore how financial-sector characteristics shape the terms and the scale of public borrowing in emerging market economies. We find that the more competitive the banking sector and the more liquid and deeper the deposit market, the better are conditions in the public securities market. We also show that the greater the central bank independence, the higher the cost of public borrowing. Furthermore, our results suggest that, in countries where banks rely significantly on foreign currency financing, the greater the government's reliance on bank lending, the greater is its exposure to exchange rate risk.     

改进的效率测算模型、影子银行与中国商业银行效率

商业银行及其效率的高低是金融供给侧结构性改革的关键环节,而可以压缩的“坏”投入和影子银行对商业银行效率产生重要影响。本文首次建立理论模型并分析影子银行影响商业银行效率的路径;方法上,同时区分投入和产出的“好”或“坏”,拓展只区分产出的“好”或“坏”的效率测算模型;实证上,首次测算并分析“坏”投入、影子银行业务对商业银行利润、风险和效率的影响。结果表明:理论上,影子银行会同时增加风险承担和利润,但无法确定经风险调整后的利润增加能否提升效率;只区分产出的模型高估了效率,尤其是显著高估四大行和股份制商业银行第一阶段的效率,大型商业银行依靠网点的扩张不利于效率的提升;影子银行业务提升了四大国有银行尤其是股份制银行的效率,但对中小型商业银行效率影响较小。总的来看,压缩“坏”投入和规范影子银行是增加有效金融供给、优化金融供给结构和提升银行效率的重要途径。     

The Impact of Internet-Banking on Brick and Mortar Branches: The Case of Turkey

The increased adoption and infiltration of the Internet has recently redefined the playground for retail banks. Retail banks are now offering their services primarily through their Internet banking branches. The repercussions of this change to “brick and mortar” banks have been studied in the context of developed market economies. In this paper, we contribute to the literature by studying the impact of Internet banking adoption on banks’ deposit collection, lending activities, and performance in an emerging market setting. By using a panel of 18 retail banks that operate in Turkey from 1990–2008, we demonstrate that Internet banking adoption has a positive impact on the level of profits, deposits and loans per branch. As operational activities are now provided via Internet branches, Internet banking facilitates banking activities in branches that require more human input. We also find that Internet banking adoption has a negative impact on bank profitability after 2 years of adoption as Internet banking increases competition and results in lower interest income. Accordingly, Internet banking complements brick and mortar branches.