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The question as to whether it is better to diversify a real estate portfolio within a property type across the regions or within a region across the property types is one of continuing interest for academics and practitioners alike. However, this study is somewhat different from the usual sector/regional analysis in that this study is designed to investigate whether a real estate fund manager can obtain a statistically significant improvement in risk/return performance from extending out of a London based portfolio into firstly the rest of the South East of England and then into the remainder of the UK, or whether the manger would be better off staying within London and diversifying across the various property types.

In order to examine these issues we form a number of portfolios that can be directly compared to a number of benchmark portfolios, as well as to each other. Then using the statistical tests developed by Gibbons et al. and Jobson and Korkie, we investigate whether the benefits that accrue from the differing diversification strategies are statistically significant or not.

The results show that staying within only one sector and one region (London) is undesirable in terms of risk and return compared with all three benchmark portfolios considered here. Secondly diversification on a naïve basis, or in an optimal fashion, leads to significant improvements in performance, irrespective of whether it is across different property types within London or within the same sector across the regions. Finally the results indicate that staying within London and diversifying across the various property types may offer performance comparable with regional diversification, although this conclusion largely depends on the time period and the fund manager's ability to diversify efficiently.

The results suggest that diversification almost always offers increased performance. Indeed a little diversification can quickly lead to levels of performance that is superior to number of benchmarks as well as performance insignificantly different from that of the most diversified portfolio that could be constructed! Consequently fund managers should be encouraged to diversify, be it across the regions or across the sectors of the UK.

Merging two real estate investment trusts (REITs) consolidates two real estate portfolios. The purpose of this paper is to provide further evidence on the market’s valuation of property type and geographic diversification of REITs by looking at the diversification impact of mergers involving domestic REITs in the Modern REIT era (post 1992).

The authors classify equity REIT mergers according to whether they maintain portfolio focus or alter their focus with respect to the geography and property type distribution of the underlying real estate. Then, using a domestic REIT index, the authors examine abnormal returns around the merger announcement to ascertain how portfolio changes affect value.

Although the results show no abnormal returns to the combined REIT for the 126 mergers in the sample, mergers that maintain geographic focus and alter the property focus contribute positively to the abnormal returns. Acquiring REITs show negative abnormal returns for mergers that either diversify geography or maintain property focus. Target REITs earn positive abnormal returns no matter the diversification impact of the merger.

The results suggest that changes to the composition of the REIT’s property portfolio have valuation implications. The results suggest that during the modern REIT Era, property diversification created positive wealth effects for the acquirer.

This research adds to the evidence on how REIT investors value changes in the diversification of the underlying properties, and implies that the investor perception of portfolio effects from mergers may vary over time as the REIT industry expands and consolidates.

The purpose of this paper is to investigate whether the presence of controlling shareholder affects the value of diversification based on Indonesian listed firms. It further examines whether the degree of controlling ownership and the types of controlling ownership matter.

Panel data were used over the period 2006-2010 with dynamic generalised method-of-moments estimations and it defined diversification as industrial diversification, international diversification or diversification in both. A few different thresholds for the control rights of the largest shareholder are also set.

The results show that industrial diversification improves firm value but international diversification does not, while diversified in both strategies discounted firm value. The presence of a controlling shareholder is found to have a significant diversification discount, and the effect is nonlinear, where the entrenchment effect occurs around 20 to60 per cent threshold of controlling across all types of diversified firms. Last, foreign firms are found to enjoy more value from industrial diversification, but it takes an adverse turn when these involve both diversification strategies. Government firms do not seem to be different from family firms.

The study shows the need to differentiate diversification strategies and account for non-linearity and ownership identity in modelling diversification value. Also, the degree of shareholders’ control can be a significant channel to address the agency issue on diversification value.

Under the backdrop of unique Indonesian corporate ownership, the presence of controlling owners is shown, and their ownership affects the value of diversification. The entrenchment effect however appears only at a certain range of ownership. This is a crucial guide for the shareholders to ensure an appropriate monitoring system is installed to maximize the shareholder’s value, especially in family firms.

The value of this paper is twofold. At first, the first empirical evidence on the diversification debate with Indonesian firms for its unique institutional setting is presented. Second, the standard modelling framework to investigate the types of ownership on diversification value is extended, which has rarely been covered in previous investigations.

The increasing growth in global trade is promoting economic diversification through efficient air cargo logistics. The overdependence of Nigeria on mono-product export, mainly crude oil, hinder the successful implementation of economic diversification policy. However, air cargo export plays a significant role in any successful economic diversification policy. Despite the importance of air export of cargo to the economy, literature is scarce on the role of air cargo export in economic diversification studies. This chapter assesses the performance of air cargo export by highlighting its inherent opportunity to support economic diversification in Nigeria. The analysis draws on air cargo export data by volume, types, and airline market share in Nigeria. Regression analysis established a significant relationship between Nigeria's gross domestic product (GDP) and air cargo export. Johansen cointegration test showed that both short and long-run cointegration exists between air cargo and GDP in Nigeria. An increasing trend in Nigeria's air cargo export volume indicates the significance of air cargo export to support economic diversification policy in Nigeria. Airlines market shares have British Airways, Virgin Atlantic, Emirates, and Saudi Air dominating the exportation of cargo in Nigeria. Agricultural products dominate the air cargo export with 34.6% volume, followed by manufacturing products (23.6%). An all-inclusive policy that promotes international trade for the economic emancipation of Nigeria through diversification into agriculture and manufacturing sectors is necessary.

Corporate diversification is a strategy that enables corporations to expand their core business into other businesses. In Malaysia, corporate diversification continues to represent a fundamental organizational structure. Some two-thirds of Malaysian firms are diversified. However, when compared to developed countries such as the US and the UK, we find that firms are moving toward non-diversification. The study is based on the population framework consisting of all of the public limited companies (PLCs) listed on the Bursa Malaysia stock exchange from 2007 to 2012. A dynamic panel model system generalized method of moments (GMM) was used to analyze the diversification and firm’s performance theories.

The empirical findings demonstrated that diversification is better than non-diversification firms for the curvilinear relationship between diversification and firm’s performance (ROA and Tobin-Q) when using the entropy index and relatedness is taken into consideration. The research further concluded that related and unrelated diversification also has a positive relationship with performance, but diversification must be the dominant (focused) and cannot be too broad in nature. Diversification that is too broad may cause a positive relationship to turn in to a negative relationship toward performance in both related and unrelated instances of diversification.

Based on farm diversification's conventional and unconventional nature, the study intends to discriminate different profiles of farm diversification businesses. Furthermore, this study analyses the links between farm diversification efforts, (open) innovation networks as well as the environmental performance (EP) and financial performance (FP) of farms.

A questionnaire was administered through personal interviews with 160 fresh fruit farmers in an inland Portuguese region. Linear regression, latent class analysis (LCA) and multinomial logistic regression were used.

There are significant differences between the levels of diversification, performance and participation in (open) innovation networks of the three classes of farmers discriminated. Different types of diversification efforts and (open) innovation networks influence EP and FP, while FP and R&D projects are associated with the likelihood of being part of a farm diversification class. Moreover, this study shows that innovation networks, promoted by specialized agricultural advisors and R&D projects, are important forms of open innovation in the agricultural sector.

The study contributes to understanding the agricultural sector's diversification efforts and (open) innovation networks and their association with EP and FP. The conventional or unconventional nature of farm diversification was self-reported.

European and local institutions are advised to develop more R&D programs directed to farmers, including environmental and financial issues, besides comprising agricultural and non-agricultural diversification.

This study provides new insights to understand the association between diversification efforts, (open) innovation networks and agricultural businesses' performance.

Diversification is one of the most promising strategies for tourism firms, the entry mode choice being an essential decision. For this reason, this paper seeks to analyze the entry mode into new business areas made by Spanish tourism firms in their diversification process. It aims to focus on firm factors drawn on the resource‐based view (RBV) to examine issues such as the link between the new business and the company's original one, its diversifying experience, the reasons for diversifying and the impact of the choice of internal growth, external growth or cooperation agreements. The effects of a fit between the entry mode and the type of diversification on profitability are also considered.

From a mail survey to Spanish tourism firms 94 entries into new business areas were obtained and a multinomial logit regression applied.

The results show that both the diversifying experience and the reasons behind the decision to diversify influence the entry mode and support the existence of a link between the above‐mentioned fit and firm profitability.

The paper contributes to providing new empirical evidence about entry mode decisions, with the innovation that it has focused on a group of enterprises, those belonging to the Spanish tourism sector, which had traditionally received less attention within this field of research.

The authors meta-analyze research on the diversification–performance relationship to empirically establish the impact of home-country formal institutional quality on this relationship. Prior research assumes that a country’s formal institutional quality negatively affects the diversification–performance relationship, especially when it involves unrelated diversification. However, empirical evidence for these propositions is inconclusive because existing studies consider blocks of countries with limited institutional heterogeneity. To provide more clarity, this study aims to consider the diversification–performance relationship across developed, emerging and developing countries.

The meta-analysis relies on a sample of 293 effect sizes of the diversification–performance relationship from 76 primary studies across 15 countries between 1988 and 2019. The sample excludes effects sizes from papers that consider both product and international diversification to control for complex interactions between the strategies, as well as papers that did not consider both related and unrelated diversification.

The results confirm that stronger home-country formal institutions weaken the diversification–performance relationship by decreasing the relative efficiency of internal markets versus external ones. Further, the effect is less negative for related diversification because this strategy can better exploit market frictions in countries with stronger formal institutions and more efficient external markets than its unrelated counterpart.

The study contributes to the literatures on the diversification–performance relationship and home-country governance by providing robust evidence for how formal institutional quality impacts the efficacy of related and unrelated diversification.

The purpose of this paper is to investigate the effect of revenue diversification, non-interest income and asset diversification on the performance and stability of the Gulf Cooperation Council (GCC) conventional and Islamic banking systems.

The authors implement a panel of 69 conventional and Islamic banks listed in six GCC markets over the period of 2003–2015, using the System Generalized Method of Moments methodology.

Non-interest income diversification has a negative impact on GCC banks’ performance, while asset-based diversification affects banks performance positively. However, Investors tend to penalize the value of the banks’ assets, which are highly diversified. Government intervention, lack of competition, legal protection and high control of Central banks on GCC banks’ have positive impact on performance. Contrary to the results on conventional banks, asset diversification adds value to Islamic banks. Overall, both banks’ revenue and non-interest diversification have negative impact on GCC banks’ stability, while asset diversification improves Islamic banks’ stability.

The analysis is limited to a sample of banks, which are listed in the GCC stock exchanges. The lack of data on private and foreign banks operating in the region made the analysis and, consequently, the results specific to shareholding companies. Also, the authors’ measures of bank stability might not be appropriate to use for Islamic banks, given their banking models implemented.

Research results provide important implications for regulators, bank managers and policy makers, as to the expected ways to support economic diversification through bank diversification strategies.

Unlike related studies, the authors’ sample of homogeneous banks has a market structure that is different from the samples in the literature covering either developed countries or heterogeneous samples from both developed and developing countries. Furthermore, using an efficient econometric methodology, the authors deal with two types of banks: conventional banks and Islamic banks. The research determines which type of bank is more able to benefit from different types of diversification. Unlike previous research, this research explores the sensitivity of the results both to the regulatory environment of the GCC market and to general market conditions.

In this study, the authors argue that there is more than meets the eye on the effects over postacquisition performance and diversification. This study aims to propose that the conditions that allow higher returns are dependent on the institutional context. The authors suggest that diversification strategies differ in their impact on postacquisition performance when moderated by the institutional inefficiencies of economies.

This research is based on a quantitative approach. The authors statistically test the hypotheses based on multiple regression analysis.

Results show a negative moderating effect of the institutional inefficiencies of the target country on the relationship between the diversification decisions of the firm and its postacquisition performance. So that Latin American firms that perform Cross-border acquisitions with higher degrees of diversification are related to worse performance. However, the degree of institutional inefficiencies negatively moderates this relation, attenuating the negative effects of diversification over performance.

Although past research has shown that economies with high institutional inefficiencies can benefit from higher levels of diversification, no study has considered the impact of the institutional inefficiencies when discussing many economies, to authors’ acknowledgment. The authors provide evidence that, in the case of Latin American firms, diversification reduces performance; however, the degree of institutional inefficiencies negatively moderates this relation.

Neste estudo, argumentamos que há mais do que aparenta sobre os efeitos sobre o desempenho e a diversificação pós-aquisição. Propomos que as condições que permitem maiores retornos dependem do contexto institucional. Sugerimos que as estratégias de diversificação diferem em seu impacto no desempenho pós-aquisição quando moderadas pelas ineficiências institucionais dos países.

Esta pesquisa é baseada em uma abordagem quantitativa. Testamos estatisticamente as hipóteses com base na análise de regressão múltipla.

Os resultados mostram um efeito moderador negativo das ineficiências institucionais do país-alvo na relação entre as decisões de diversificação da empresa e seu desempenho pós-aquisição. Assim, firmas latino-americanas que realizam F&As com maior grau de diversificação estão relacionadas a pior desempenho. No entanto, o grau de ineficiências institucionais modera negativamente essa relação, atenuando os efeitos negativos da diversificação sobre o desempenho.

Embora pesquisas anteriores tenham mostrado que economias com altas ineficiências institucionais podem se beneficiar de níveis mais altos de diversificação, nenhum estudo considerou o impacto das ineficiências institucionais ao discutir diversos países. Fornecemos evidências de que, no caso das empresas latino-americanas, a diversificação reduz o desempenho, porém, o grau de ineficiências institucionais modera negativamente essa relação.

En este estudio, argumentamos que hay más en los efectos sobre el desempeño posterior a la adquisición y la diversificación de lo que parece. Proponemos que las condiciones que permiten mayores rendimientos dependen del contexto institucional. Sugerimos que las estrategias de diversificación difieren en su impacto sobre el desempeño posterior a la adquisición cuando se ven atenuadas por las ineficiencias institucionales del país.

Esta investigación se basa en un enfoque cuantitativo. Probamos estadísticamente las hipótesis con base en análisis de regresión múltiple.

Los resultados muestran un efecto moderador negativo de las ineficiencias institucionales en el país objetivo sobre la relación entre las decisiones de diversificación de una empresa y su desempeño posterior a la adquisición. Así, las firmas latinoamericanas que realizan M&A con un mayor grado de diversificación se relacionan con un peor desempeño. Sin embargo, el grado de ineficiencias institucionales modera negativamente esta relación, atenuando los efectos negativos de la diversificación sobre el desempeño.

Investigaciones anteriores han demostrado que las economías con altas ineficiencias institucionales pueden beneficiarse de niveles más altos de diversificación, ningún estudio ha considerado el impacto de las ineficiencias institucionales cuando se analiza de varios países. Proporcionamos evidencia de que, en el caso de las empresas latinoamericanas, la diversificación reduce el desempeño, pero el grado de ineficiencias institucionales modera negativamente esta relación.