Stock exchange mergers and weak form of market efficiency: The case of Euronext Lisbon

This exploratory paper is among the first to examine the impact of stock exchange mergers on informational market efficiency. We focus on the merger of Bolsa de Valores de Lisboa e Porto (Portuguese Stock Exchange) with Euronext in 2002 (that created Euronext Lisbon). To investigate this question we perform numerous statistical tests: serial correlation test (ACF test), runs test, unit root test (Kwiatkowski, Philips, Schmidt, & Shin, 1992), multiple variance ratio test (Chow & Denning, 1993) and ranks and signs test (Wright, 2000).The results indicate that the Portuguese Equity Market is inefficient in weak form during pre-merger period implying that investors possessed an opportunity to earn abnormal returns though small in magnitude. The results, sensitive to the methodology used, indicate a mixed evidence of improvement in market efficiency during the post-merger period. Although the findings are mixed, yet most tests show a tendency of improved efficiency.     

Mergers,cartels and leniency programs: The role of capital stocks

This paper examines the impact of mergers on collusion, depending on the endowment of capital assets among firms. We show that mergers render collusion easier to sustain when an asymmetric capital stock is combined with less-efficient insiders, due to more symmetric conditions and tighter incentive constraints. Moreover, the model allows us to determine an optimal threshold of asymmetry between insiders and outsiders such that mergers have pro-competitive effects; we compare this value with that which would generate perfect symmetry between firms after the merger.     

Merger Waves and Firm Growth: Contemporary Historical Evidence

This article presents the outcomes of an evaluation of the impact of the series of mergers of the local exchange companies that have taken place between 1988 and 2001 on an important measure of performance of the firms undergoing the mergers. The analysis reveals that after firms have undertaken one merger they experience little or no growth after such mergers, but the impact of second mergers on firm growth have been negative. If an important motive in undertaking mergers has been to enhance firm growth, then the merger waves that have been approved and consummated have led to performance declines. The impacts of the merger wave on the growth of the telecommunications sector firms have been negative.     

Are mergers among cooperative banks worth a dime? Evidence on efficiency effects of M&As in Italy

We study the intense wave of mergers among Italian mutual cooperative banks (Banche di Credito Cooperativo, BCCs) trying to assess whether those mergers were efficiency-enhancing. Specifically, we employ a two-step procedure: first estimating bank-level cost efficiency scores over 1993–2013 via a stochastic frontier approach, then trying to explain the estimated BCCs' scores with a set of merger status dummies (never merged, before the first merger, merged once, merged twice, etc.) and a vector of control variables. We find that mergers increase mutual banks' cost efficiency only in 5% of the mergers, precisely those in which a BCC has merged at least three successive times with other BCCs. Besides, we conjecture that the serial mergers led those BCCs to reach remarkably large size and this could harm especially marginal borrowers (i.e. those likely served by smaller banks but neglected by bigger ones), with strong adverse impact on development and inequality and violating BCCs' ethics and mission.     

Mergers in the Electric Utility Industry in a Deregulatory Environment

We document that the merger announcement returns are positive and significant for targets of acquiring electric utility industry firms, but are not as algebraically large as target returns documented in non-regulated industry merger announcements. Additionally, electric utility acquirer firms earn significant negative announcement returns when acquiring an electric utility. We find announcement returns for acquirers vary significantly based upon the timing of the merger announcement, with mergers announced after the Energy Policy Act of 1992 generating negative returns for acquirers. We also find a significant difference in the percentage change in aggregate entity value around the announcement date for diversifying mergers as compared to non-diversifying mergers, with diversifying merger announcements resulting in a decrease in aggregate entity value.     

跨国并购、人民币汇率波动与企业经营风险

本文基于新冠疫情爆发后跨国并购规模不断扩大的背景下，利用全球并购数据以及国泰安数据库中的上市公司财务数据，将每家企业的跨国并购事件作为准自然实验，采用多期双重差分模型研究企业跨国并购对经营风险的影响，研究发现：跨国并购显著降低了企业经营风险，为了解决偏误性问题，本文还对其进行了双重差分倾向得分匹配检验。进一步影响机制表明，跨国并购通过“人力资本效应”提高了企业管理效率以及通过“技术进步效应”解决了企业在核心技术方面“卡脖子”的问题，进而降低经营风险。从异质性上看，跨国并购对降低技术密集型企业和大规模企业的经营风险效果更强。同时，本文还发现人民币汇率大幅度波动会加大跨国企业经营风险。因此，研究跨国并购对企业经营风险的影响，对企业长期高质量发展与提高国际竞争力具有现实意义。     

A time series analysis of causality between aggregate merger and stock prices: the case of Canada

It is widely agreed that a positive relationship exists between measures of aggregate merger activity and measures of stock market performance, at least for the USA. Evidence from other countries is relatively sparse. in this paper we pursue the causality question using Canadian data. Most of the previous studies used only a bivariate system (merger and stock prices). We have extended the analysis to trivariate system (merger, stock prices and interest rate) to better reflect the capital market conditions argument for changes in merger activity. The results suggest a bidirectional causality between mergers and stock prices.     

Mergers and acquisitions as a response to the deregulation of the electric power industry: value creation or value destruction?

Many electric utilities, as a response to the deregulation of the electric power industry, adopted a strategy of acquiring other electric or gas utilities. We examine whether these merger and acquisition strategies create value for the utility shareholders and whether the strategies result in superior post-merger operating and stock-price performance relative to utilities that did not grow through acquisitions. We find little evidence that the mergers and acquisitions created long-term value for a fully diversified investor. Furthermore, the stock price and operating performance of the acquirers under performed the stock price and operating performance of a control portfolio of utilities that did not engage in merger activity.      

A test of the impact of mergers on bank competition

We propose a new test to evaluate the impact of horizontal mergers on competition in the banking industry. The test is designed to be applied ex ante to potential mergers while being parsimonious in terms of data, as it only uses information on branches in local markets. The test is a counterfactual exercise based on a two‐stage model where banks compete in branching and interest rates and requires comparing the estimated degree of competition in the status quo, where branching networks by banks are those actually observed, with a counterfactual scenario, where the branching network of the new entity is the sum of the branches of the banks involved in the horizontal merger. The statistical difference between the two estimated measures of competition quantifies the impact of the merger. We apply our test to French and Italian mergers.     

Do city–county mergers in China promote local economic development?

Municipal mergers have become a worldwide phenomenon in the past few decades, primarily advanced to exploit economies of scale. While most evaluations of municipal mergers have focused on the efficiency of local public goods provision, it is rare in the literature to explore how such mergers promote economic growth in a developing country context. This research investigates the economic consequences of a policy experiment of city–county mergers (che xian she qu) in China during the period 2000–2004. Using comprehensive datasets at city, county and firm levels, we present evidence that the merger significantly increases local economic development, and the magnitude of the effect depends on local endowments related to agglomeration forces. The results are robust to a number of different model specifications. We further verify that improved transport infrastructure and urban agglomeration economies after merger are potential contributors to the positive merger effects.     

Deregulation, consolidation and banks efficiency in Singapore: Evidence from event study window approach and Tobit analysis

A three-year window analysis together with the Data Envelopment Analysis (DEA) approach is employed to investigate the effects of mergers and acquisitions on the Singapore banking groups’ efficiency. The results suggest that the merger has resulted in a higher Singapore banking groups’ mean overall efficiency. We do not find evidence of more efficient acquirers compared to the targets and that the acquiring banks’ mean overall efficiency tends to improve from the merger with a more efficient bank. The Tobit regression results suggest that bank profitability has positive impact on bank efficiency, whereas poor loan quality has negative influence on bank performance. (JEL: G21, D24) All findings, interpretations, and conclusions are solely those of the authors’ and do not necessarily represent the views of the institutions to which they belong. We would like to thank the anonymous referees for their comments and suggestions. The remaining errors are of our own.     

An Assessment of Bank Merger Success in Germany

Abstract. German banks have experienced a merger wave since the early 1990s. However, the success of bank mergers remains a continuous matter of debate.This paper suggests a taxonomy to evaluate post-merger performance on the basis of cost and profit efficiency (CE and PE). I identify successful mergers as those that fulfill simultaneously two criteria. First, merged institutes must exhibit efficiency levels above the average of non-merging banks. Second, banks must exhibit efficiency changes between merger and evaluation year above efficiency changes of non-merging banks. I assess the post-merger performance up to 11 years after the mergers and relate it to the transfer of skills, the adequacy to merge distressed banks and the role of geographical distance. Roughly every second merger is a success in terms of either CE or PE. The margin of success in terms of CE is narrow, as efficiency differentials between merging and non-merging banks are around 1 and 2 percentage points. PE performance is slightly larger. More importantly, mergers boost in particular the change in PE, thus indicating persistent improvements of merging banks to improve the ability to generate profits.     

The impact of mergers on acquiring firm shareholder wealth: The 1905–1930 experience

From the standpoint of investors successful acquisitions increase profitability and stock Contemporary studies find acquiring firm shareholders earning small gains before and large losses after consolidation. Using modern financial market procedures, we examine a portfolio of 191 acquiring firms from 1905 to 1930 to determine the impact on firm owners of early industrial acquisitions in the United States and the effect of institutional changes on takeover gains. Acquisitions from 1905 to 1930 raised shareholder wealth by more than 3 percent, an increase exceeding gains from more recent mergers. Stock price continued to rise after completion for acquisitions before World War I, but fell dramatically for acquisitions during the oligopoly merger wave of the late 1920s.We would like to thank Patrick Byrne and Tara Nussman for help in collecting the financial data, Ralph Nelson for permitting us to use his and Carl Eis's worksheets on merger activity from 1905 to 1930, and George Bittlingmayer, Malcolm Burns, David Gulley, Stephen Grubaugh, Lori Leeth, John Matsusaka, Dennis Mueller, Rexford Santerre, Scott Sumner, Tugrul Temel, and Nikhil Varaiya for their helpful comments.     

MERGERS AND PRODUCT QUALITY: A SILVER LINING FROM DE‐HUBBING IN THE U.S. AIRLINE INDUSTRY

This paper investigates how de‐hubbing, which occurs when an airline ceases hub operations, impacts product quality. Examining four cases of de‐hubbing following U.S. airline mergers between 1998 and 2016, we analyze three product quality measures: on‐time performance, travel time, and flight cancellations. In order to isolate a merger's impact on product quality, we compare the results of four de‐hubbing events that followed a merger with three de‐hubbing cases that occurred independently of a merger. We find a silver lining from mergers because product quality improvements are isolated to de‐hubbing events which follow airline mergers rather than nonmerger‐induced de‐hubbing. (JEL L15, L93)     

政府干预、政治关联与地方国有企业并购

本文以2001—2005年间发生的地方国有上市公司收购非上市公司的事件为样本,研究地方政府干预、政治关联对地方国有企业并购绩效的影响。研究发现:地方政府干预对盈利样本公司的并购绩效有负面影响,而对亏损样本公司的并购绩效有正面影响。这说明,出于自身的政策性负担或政治晋升目标,地方政府会损害或支持当地国有上市公司,这为政府"掠夺之手理论"和"支持之手理论"提供了实证支持。我们还发现,盈利样本公司的并购绩效与政治关联正相关。这表明,政治关联可以作为法律保护的替代机制来保护企业产权免受政府损害。     

Misallocations and policy constraints on mergers in the modern manufacturing sector

Resource misallocation has resulted in differences in inter-economy total factor productivity (TFP). However, the factors driving different levels of resource misallocation still need to be investigated. This paper argues that firm exits through mergers can be an important source of change in the level of resource misallocation. Traditional policy regulations for the key manufacturing sectors are based on either the four-firm concentration ratio (CR4) or the Herfindahl–Hirschman Index (HHI), which measure the market concentration. This paper takes a different approach. It first deduces the optimal input allocation by measuring aggregate resource misallocation; this approach allows us to identify productivity-improving merger events and complements the market concentration indexes, which have traditionally been the focus of attention. We then construct a unique dataset in the TFT-LCD industry to analyze the change in productivity resulting from the merger between two major TFT-LCD producers, Chimei and Innolux, in the first quarter of 2010. The proposed and actual team of Chimei and Innolux record a remarkable efficiency jump by achieving optimal input allocation immediately after this merger. We further interpret this scenario as a firm that is smaller and more efficient pre-merger, acquiring a larger weaker producer in a prominent IT manufacturing sector.     

MARKET COMPETITION BEFORE AND AFTER BANK MERGER WAVE: A COMPARATIVE STUDY OF KOREA AND JAPAN

Abstract. Reflecting recent merger trends in the banking industry of Korea and Japan, this paper examines the degree of competition before and after the bank merger wave. Two major implications are derived from empirical analyses. First, high levels of banking market competitiveness are detected after mergers in both the Korean and Japanese metropolitan areas. Second, although the level of market competition remains low throughout Japanese local cities, it is competitive compared with the metropolitan area of Korea. This paper concludes that market concentration brought about by bank mergers does not always result in low competitiveness.     

TESTING MODELS OF DIFFERENTIATED PRODUCTS MARKETS: CONSOLIDATION IN THE CABLE TV INDUSTRY

Research on differentiated products markets often uses structural demand/supply models to identify firms' marginal costs as product‐level cost data are unavailable. Using unique demand and cost data from cable TV, I evaluate a differentiated products model's ability to identify marginal costs. I find firms systematically price below profit‐maximizing levels, leading to biases in the model's marginal cost estimates. I study the implications for merger simulations and find that these biases compromise estimates of merger‐related cost efficiencies, yet do not prevent these models from generating useful predictions of the price and nonprice effects of mergers.     

Technology Transfer and Merger Activities with Trade and Tariffs

In order to better understand the effects of globalization on merger incentives this paper considers a set of commonly observed mergers whereby a restructured target (with improved managerial or technical capability) continues to supply the market. In contrast to the market‐concentrating merger literature it finds that trade barriers tend to encourage mergers, including potentially welfare‐reducing, tariff‐jumping mergers. Multilateral trade liberalization, however, encourages welfare‐improving mergers. Hence, and despite the skepticism of regulatory authorities towards the existence of cost synergies as a consequence of mergers, this paper suggests that in order to assess the impact of trade liberalization under the WTO on merger incentives, and consequently on prices, quantities, and welfare, accurate information on ex ante cost differences and the transferability of managerial and technical techniques is required.     

Product differentiation, cost‐reducing mergers, and consumer welfare

Abstract.  Cost synergies are an explicitly recognized justification for a two‐firm merger, and empirical techniques are now widely used to assess the impact of cost‐reducing mergers on prices and welfare in the post‐merger market. We show that if the merger occurs in a vertically product differentiated market, then the merger will lead to a reduction in product offerings that limits the usefulness of pre‐merger empirical estimates. Indeed, we further show that in such markets, two‐firm mergers will typically lead to higher prices regardless of the merger's cost savings. JEL classification: L10, L41