Effect of diversification on firm performance: Application of the entropy measure

This study investigated the effects of diversification on firm performance in the restaurant industry. In prior studies, the theoretical rationales and empirical results appeared to contradict each other. These contradictory results may be due to factors such as industry-specific characteristics or a linear understanding of the relationship between diversification strategies and firm performance. Thus, this study suggested a non-linear hypothesis based on the costs and benefits of diversification strategies with businesses categorized based on their level of diversification. The results of this study showed that restaurant firms do not benefit from a low level of related diversification. This study also found that when restaurant firms are involved in both related and unrelated businesses, the optimal mixed ratio of diversification is approximately half and half. More detailed results, as well as academic and practical implications, are discussed in this paper.     

Towards Assessing the Knowledge Gap in Medical Tourism

The medical tourism industry is a fast growing global niche market that generated $20 billion in income for destinations around the world. This study suggests and tests a mechanism to assess the medical tourism providers’ perceptions about the tourists’ perceived important product attributes when selecting a medical tourism destination. The results indicate that the various medical tourism providers groups do not vary in their perceptions regarding 24 important attributes of the medical tourism product and that they all agree that tourists perceive the medical variables to be more important than the tourism related variables. Using the Korean market for data collection, the study’s additional contribution is providing insights for Korean government agencies, operators of medical tourism hospitals, policymakers, and marketers.     

Regulatory Uncertainty and Financial Contagion: Evidence from the Hybrid Capital Securities Market

This paper examines the negative market impact that resulted from the insurance regulators’ potential reclassification of 140 hybrid capital securities in spring and summer 2006. It illustrates how financial contagion can spring from a regulatory policy change that lacks transparency. We investigate the impact of the uncertainty surrounding the regulators’ true classification criteria by measuring the effect of the reclassification announcements on hybrid new issue volume, cumulative average abnormal returns, bid‐ask spreads, and yield spreads. The financial contagion adversely affected the entire hybrid capital securities market for six months. The effect was most pronounced among those hybrids that were eventually reclassified as common equity equivalents. It was greater for Yankee Tier 1 hybrids, which had been more popular with insurance firm investors prior to the reclassifications, than among non‐Tier 1 hybrids.     

Linear programing models for portfolio optimization using a benchmark

We consider the problem of constructing a perturbed portfolio by utilizing a benchmark portfolio. We propose two computationally efficient portfolio optimization models, the mean-absolute deviation risk and the Dantzig-type, which can be solved using linear programing. These portfolio models push the existing benchmark toward the efficient frontier through sparse and stable asset selection. We implement these models on two benchmarks, a market index and the equally-weighted portfolio. We carry out an extensive out-of-sample analysis with 11 empirical datasets and simulated data. The proposed portfolios outperform the benchmark portfolio in various performance measures, including the mean return and Sharpe ratio.     

Audit Committees and Managerial Influence on Audit Quality: ‘Voluntary’ versus ‘Mandatory’ Approach to Corporate Governance

This study provides empirical evidence on how managerial influence to reduce audit quality is moderated by a combination of the audit committee (AC) form and compliance with AC best practice guidelines. There is a negative association between managerial ownership and audit fees; however, the association becomes positive when a voluntary AC follows best practices. Furthermore, the results are robust to the exclusion of industries with large frequency in the sample, the consideration of Korean business groups and recessionary times. The results of this study imply that a voluntary approach to corporate governance, which encourages companies to follow best practice guidelines in the form and composition of the AC, is more effective in controlling management than a mandatory approach. This study contributes to policy making aimed at improving AC effectiveness.     

Financial Integration in Asset and Liability Holdings in East Asia

In this article, we examine the evolution of intra-East Asian financial integration from 2001 to 2013. Most existing studies on this topic look primarily at asset holdings; we examine liability holdings as well. Using the International Monetary Fund’s Coordinated Portfolio Investment Survey data for equities, long-term debt, and short-term debt, our analysis generally supports the conventional wisdom that East Asian countries are more financially integrated with global financial centers than they are with each other. This is true for both asset holdings and liabilities and is confirmed by an econometric analysis based on financial gravity equations. However, the gap between global integration and regional integration has narrowed for asset holdings over time but not for liability holdings. The results of additional econometric analysis indicate that diversification of liability holdings can mitigate financial instability due to global financial shocks. More precisely, diversification was associated with smaller exchange rate depreciation during the quantitative easing taper tantrum of 2013. These results point to a possible benefit from strengthening regional financial integration. Deeper regional integration would reduce dependence on global financial markets for funding and hence vulnerability to global shocks.     

Corruption,soundness of the banking sector,and economic growth: A cross-country study

This paper explores the impact of corruption on both the banking sector and economic growth; we determine the impact using 76 macroeconomic data from various countries over the period 2002–2004. The results of various cross-sectional regressions provide substantial evidence that corruption significantly aggravates the problems with bad loans in the banking sector. In this study, we also find some evidence of a new channel through which corruption lowers economic growth: Corruption distorts the allocation of bank funds from normal projects to bad projects, which decreases the quality of private investments, hence it decreases economic growth.     

Personalized goal-based investing via multi-stage stochastic goal programming

In this paper, we propose a goal-based investment model that is suitable for personalized wealth management. The model only requires a few intuitive inputs such as size of wealth, investment amount, and consumption goals from individual investors. In particular, a priority level can be assigned to each consumption goal and the model provides a holistic solution based on a sequential approach starting with the highest priority. This allows strict prioritization by maximizing the probability of achieving higher priority goals that are not affected by goals with lower priorities. Furthermore, the proposed model is formulated as a linear program that efficiently finds the optimal financial plan. With its simplicity, flexibility, and computational efficiency, the proposed goal-based investment model provides a new framework for automated investment management services.     

The Effects of Brand Strategy and Technological Uncertainty on Pioneering Advantage in the Multigenerational Product Market

This research investigates how brand strategy and technological uncertainty influence the order‐of‐entry effects for a previous generation pioneer in the successive generation. The findings of our longitudinal experiment reemphasize the importance of continuous pioneering, demonstrating that consumers exhibit a strong preference for a previous generation pioneer's product when it continues to pioneer the successive generation. More importantly, the findings indicate that continuous pioneering with a new brand leads to greater brand preferences when technological uncertainty is high. This is because in that condition, consumers perceive greater innovativeness with a new brand than with the extant one. On the other hand, an extant brand increases consumer brand preferences for a previous generation pioneer's product in the successive generation when technological uncertainty is low. The theoretical and practical implications of the results for understanding and managing pioneering advantage and brand strategy in the multigenerational product markets are discussed.