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Academic research has intensively analyzed the relationship between market concentration or market power and banking stability but provides ambiguous results, which are summarized under the concentration-stability/fragility view. We provide empirical evidence that the mixed results are due to the difficulty of identifying reliable variables to measure concentration and market power.

Using data from 3,943 banks operating in the European Union (EU)-15 between 2013 and 2020, we employ linear regression models on panel data. Banking market concentration is measured by the Herfindahl–Hirschman Index (HHI), and market power is estimated by the product-specific Lerner Indices for the loan and deposit market, respectively.

Our analysis reveals a significantly stability-decreasing impact of market concentration (HHI) and a significantly stability-increasing effect of market power (Lerner Indices). In addition, we provide evidence for a weak (or even absent) empirical relationship between the (non)structural measures, challenging the validity of the structure-conduct-performance (SCP) paradigm. Our baseline findings remain robust, especially when controlling for a likely reverse causality.

Our results suggest that the HHI may reflect other factors beyond market power that influence banking stability. Thus, banking supervisors and competition authorities should investigate market concentration and market power simultaneously while considering their joint impact on banking stability.

This study aims to evaluate the degree of competition in the Zambian banking sector in the wake of dynamic market shifts induced by entry of new foreign banks and privatisation of the state‐owned bank.

Competition is measured using the Panzar‐Rosse H‐statistic and the Lerner index from 1998‐2011.

Results from the H‐statistic show that Zambian banks earned their revenue under conditions of monopolistic competition. This finding is consistent with the estimate of the Lerner index which suggests that the degree of competitiveness may not be as low as previously understood. Risk taking, revenue diversity and regulatory intensity are all important determinants of market power. Tight monetary policy is also found to strengthen the banks' exercise of market power by expanding their holdings of Treasury securities. Generally, the findings lend support to previous research suggesting that foreign bank penetration and privatisation can heighten competitive pressures in the banking sector.

Due to data unavailability prior to 1998, the study does not establish whether or not the level of competition has changed since 1992 when financial sector reforms were initiated.

The main policy lesson drawn from the analysis is that competitive conditions could be further enhanced by easing regulatory impediments and, in the long run, allowing more foreign bank participation could spur competitive conduct in the industry.

To the author's knowledge, estimates of the time varying bank‐specific Lerner index provide initial empirical evidence on competitive conduct of Zambian banks and how it has evolved over time.

The present study assesses the commercial bank profit efficiency and its relationship to banking sector competition in a rapidly growing emerging economy, India from 2009 to 2019 using stochastic frontier analysis (SFA).

Lerner indices, conventional and efficiency-adjusted, quantify competition. Two SFA models are employed to calculate alternative profit efficiency (inefficiency) scores: the two-step time-decay approach proposed by Battese and Coelli (1992) and the recently developed single-step pairwise difference estimator (PDE) by Belotti and Ilardi (2018). In the first step of the BC92 framework, profit inefficiency is calculated, and in the second step, Tobit and Fractional Regression Model (FRM) are utilized to evaluate profit inefficiency correlates. PDE concurrently solves the frontier and inefficiency equations using the maximum likelihood process.

The results suggest that foreign banks are less profit efficient than domestic equivalents, supporting the “home-field advantage” hypothesis in India. Further, increasing competition drives bank managers to make riskier lending and investment choices, decreasing bank profit efficiency. However, this effect varies depending on bank ownership and size.

Literature on the competition bank efficiency link is conspicuously scant, with a focus on technical and cost efficiency. Less is known regarding the influence of competition on bank profit efficiency. The article is one of the first to examine commercial bank profit efficiency and its relationship to banking sector competition. Additionally, the study work represents one of the first applications of the FRM presented by Papke and Wooldridge (1996) and the PDE provided by Belotti and Ilardi (2018).

Bank competition and financial stability are often cited as important drivers of economic growth. Bank competition plays a very significant role in enhancing the efficiency and determining the stability of a financial system. However, a question of interest is whether bank competition enhances or hindrances the economic growth of a country. The purpose of this paper is to investigate the role of bank competition and financial stability on economic growth for selected South Asian economies over the period 1997–2016.

To investigate whether bank competition enhances or hinders economic growth, the author applies a two-step estimation technique. First, the author estimates bank competition using the Lerner index and adjusted Lerner index and, second, examines the joint effect of bank competition and financial stability on economic growth applying both panel regression model and system GMM techniques.

Empirical findings reveal that the banking sector in South Asian economies is competitive as indicated by the estimated values of Lerner and adjusted Lerner index. Moreover, the joint effect defined by the interaction between banking competition and banking stability also reveals a positive and significant impact on economic growth. This finding implies that both banking competition and banking stability are significant long-term determinants of economic growth in South Asian economies.

This paper suggests flexible banking regulation policies such as low net interest rate margins, lesser activity restrictions and entry of foreign banks along with few contestability measures to increase bank competition in South Asian countries. This is because as higher the competition, greater is the chance for efficient allocation of resources and hence economic growth.

This paper is the first of its kind that considers the joint role of bank competition and financial stability on economic growth. The application of a semi-parametric approach in the estimation of marginal cost is also a unique contribution to empirical literature.

This paper investigates the relationship between market power and efficiency for Indian banks in order to test the validity of the quiet life hypothesis (QLH) during 2005–2019.

First, the bank-level DEA efficiency scores and three measures of the Lerner index: traditional, efficiency-adjusted, stochastic are estimated. Then, efficiency scores are regressed on Lerner indices plus a set of banking and economic control variables.

Robust evidence against the QLH is obtained. Moreover, the conventional Lerner index suggests that market power of Indian banks, as well as of the different bank groups, increased during the study period, due to a greater reduction in costs compared to that of the price of banking services. The efficiency scores also declined for the banking system as a whole, and for all bank groups except new private banks.

This is the first study testing the QLH for the different categories of Indian banks and also provides robust inferences by using both stochastic and non-stochastic measures of market power.

The study aims to investigate the relationship between competition and efficiency. Using bank-level data for Indian banks, relationship between competition and efficiency is examined by applying the Granger causality test for the period 1996 to 2011.

Lerner Index is a measure of market power and is applied for estimation of competition. Data envelopment analysis technique is applied for measuring efficiency in the Indian banking system along with the Granger causality test to look at the relationship between competition and efficiency.

Results show an increasing trend for competition for the period 1996 to 2004, and after that there is fall in competitive levels. Granger causality tests show that competition positively effects efficiency and vice-versa.

This study gives an insight into the relationship between competition and efficiency, thus providing an alternative view to the structure–conduct–performance paradigm. An efficient banking system can positively impact the growth of an economy and, hence, competition and efficiency are important decision parameters for regulators and could help them in decision-making and policy formulation.

This study has covered more than 90 per cent of the banking assets for looking at competition and efficiency in the banking sector. Policymakers can try to improve competitive levels in banking so as to improve efficiency in the banking sector which can further help in developing the investment-savings cycle.

The expansion of the Islamic banking industry seems to accentuate the banking competition in MENA and Southeast Asia where conventional and Islamic banks coexist. In this context, the research aims\ to examine the competitive conditions and the market power of the conventional and Islamic banks during the period 2004-2009 in MENA and Southeast Asia region.

The authors use a variety of structural and non-structural measures related to the traditional approach and the new empirical approach of the industrial organization. The methodology is based on set of measures of the competition and market power. The first measure is a set of concentration ratios (C3, C5) and Herfindahl-Hirschman index (HHI). The second measures are the Panzar and Ross H statistic and the Lerner index based on econometric estimations with the aim of evaluating the structure of market and measuring its power in terms of price setting.

The results indicate that under the HHI index, both markets are low concentrated, while according to the concentration ratios, the Islamic market is considered as moderately concentrated. The estimations results, through the H-PR-statistic of Panzar and Ross related to degree of competition and the Lerner index of market power, indicate that both markets are characterized by a monopolistic competition and the Islamic banking expressed a high degree of market power.

The research focuses exclusively on the countries where the data are available and excludes the other countries where competition and market power might have different forms.

In a competitive environment, each bank is required to analyze the structure of its market and competitive conditions, in order to develop a business strategy and effective action plans. In the context of the multiplication of the Islamic banks in the MENA and Southeast Asia, the enhancement of Islamic bank competitiveness by offering new products is determinant for their success.

To the best of the authors' knowledge few studies have examined this subject in a comparative analysis between the Islamic and conventional banks. So the authors contribute to the literature on Islamic banking by considering a sample of Islamic and conventional banks operating in the same countries in order to examine the existence or not of difference between them.

The purpose of this paper is to estimate the cost and profit efficiency (PE) of Chinese commercial banks in the last ten years and investigate how market power affects bank efficiency and stability.

The paper builds a stochastic frontier analysis model to evaluate the cost and PE of commercial banks. The paper then uses a Lerner index and Z-index to represent market power and stability, respectively. In addition, the paper empirically analyzes the relationship between market power and bank efficiency, stability in the last ten years.

The results show that the efficiency of banks on the Chinese mainland increased during the study period, but is still lower than that of banks in Hong Kong; moreover, the efficiency of four state-owned commercial banks is lower than that of medium and small banks. Market power has a negative relationship with efficiency while its relationship with stability varies among Chinese banks.

The results imply that the promotion of financial liberalization and banking reform to introduce an appropriate competition mechanism has had a positive effect on the efficiency and stability of Chinese commercial banks.

Thus, the paper will contribute to deepen reform and opening up the banking sector in China.

The healthy development of banking can enhance the ability of banks to withstand financial risks, to promote the harmonious development of society.

The paper estimates the cost and PE of Chinese commercial banks using SFA model and investigates how market power affects bank efficiency and stability. The study design has a certain novelty, where Lerner index and Z index are used, respectively, to measure market power and stability and management efficiency of commercial banks is investigated from two aspects – PE and cost efficiency – by the translog cost function, instead of Douglas production function. In addition, the paper tries to put some of Hong Kong banks included in the study sample, and has a certain reference value.

Analysis of the trade-off between competition and financial stability has been at the center of academic and policy debate for over two decades and especially since the 2007-2008 global financial crises. This study aims to provide particular attention to the Islamic banking system which principally involves with the riba-free instruments as compared to the conventional interest-based system. The results show that an increase in the concentration in the conventional banking sector can lead to the deterioration of stability through the increased prices. For Islamic banks, an increase of the market power can positively affect the banking stability.

Two complementary approaches, namely, one-step generalized method of moment (GMM) system analysis and panel vector autoregressive (PVAR) framework, were applied.

The results show the same effect of Islamic and conventional banks’ market power on banking soundness; yet, a different effect is displayed with non-performing loans (NPLs). In particular, the “competition–fragility” assumption for both banking industries is supported when considering z-score as the dependent variable. Including NPLs, this postulation is still approved for conventional banks; however, the “competition–stability” postulation is supported for Islamic banks.

The existent literature was scarcely interested in exploring the concept of competitivity in the context of Islamic banking sector as compared to the conventional one by applying two complementary approaches, namely, GMM and PVAR. This later allows to test the effect and the feedback effect of the competition and stability concepts.

The purpose of this paper is to examine the competitive conditions and market power of Islamic banks in Indonesia for the period of 2006-2013.

Using samples of 27 Islamic banks, the study uses a variety of structural and non-structural measures related to the traditional approach and the new empirical approach of the industrial organization. The methodology is based on a set of measures of the competition and market power. The first measures, concentration ratios and Herfindahl–Hirschman index, are to determine the competitiveness level, while the second measures of Panzar–Rosse H-statistic and Lerner index are to examine the market power of Islamic banks in Indonesia.

The finding of this study has confirmed the situation of Islamic banking industry in Indonesia which is operated in a higher degree of market power which leads to a less competitive market. Islamic banks earn their revenues under monopolistic competition over the tested period. This study has also found a negative but insignificant relationship between concentration and competition which shows that in the past few years, the market power for leading firms in Indonesia Islamic banking industry has reduced.

The paper is a very useful source of information that may provide relevant guidelines in guiding the future development of competition of Islamic Banking industry. In addition, the paper provides relevant guidelines for improving competitiveness of Islamic banks.

This study combines two approaches for bank competition measurement and bank market powers measurement which can provide more robust findings. To the best of the authors’ knowledge, the study on Islamic banking competitiveness level and market power is very limited, especially in the case of Indonesia. Therefore, this study could contribute significantly toward the literature of the related field.