• Animal Systematics, Evolution and Diversity
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• 제30권1호
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• pp.39-43
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• 2014

In this brief report, alternative time-varying diversification rate models were fitted onto the phylogeny of global amphibians by considering one-constant-rate (OCR), one-continuous-shift (OCS) and multiple-discrete- shifts (MDS) situations. The OCS diversification model was rejected by ${\gamma}$ statistic (${\gamma}=-5.556$, p<0.001), implying the existence of shifting diversification rates for global amphibian phylogeny. Through model selection, MDS diversification model outperformed OCS and OCR models using "laser" package under R environment. Moreover, MDS models, implemented using another R package "MEDUSA", indicated that there were sixteen shifts over the internal nodes for amphibian phylogeny. Conclusively, both OCS and MDS models are recommended to compare so as to better quantify rate-shifting trends of species diversification. MDS diversification models should be preferential for large phylogenies using "MEDUSA" package in which any arbitrary numbers of shifts are allowed to model.

• KDI Journal of Economic Policy
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• 제41권1호
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• pp.1-14
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• 2019

This paper studies whether export diversification mitigated the negative effect of the global financial crisis on exports using the Korean case. Specifically, we use annual data on the exports of 24 Korean manufacturing industries from 2000 to 2016 and examine whether the negative effect of the crisis on exports was less prevalent in industries that were more diversified in terms of country and product. We also examine whether export competitiveness, as measured by the revealed comparative advantage index by industry, had a mitigating effect on trade during the crisis. In order to study these issues, we use panel regression with a fixed-effect model for 24 Korean manufacturing industries. From our empirical analysis, we find that country diversification weakened the negative impact of the global financial crisis on Korea's exports, whereas neither product diversification nor export competitiveness did so.

• International Journal of Advanced Culture Technology
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• 제10권3호
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• pp.202-209
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• 2022

This study investigates the association between corporate international diversification and audit fees and audit hours. Korean firms' overseas investment has rapidly increased in recent years and the trend of international diversification is expected to accelerate in the future. Thus, it is important to investigate how auditors respond to globally diversified firms. Our empirical findings show that internationally diversified firms incur higher audit fees and audit hours. This suggests that auditors perceive global diversification as being a higher business risk and require higher external audit fees so that they can decrease audit risk arising from inherent organizational complexity. Further, auditors expand audit procedures to collect more audit evidences, exerting increased audit effort. This study provides empirical evidences that corporate global diversification results in higher audit fees and audit hours. Auditors may refer to these results when planning their audit and determining audit fees and audit hours.

• 한국건축시공학회지
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• 제21권4호
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• pp.319-331
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• 2021

본 연구는 베리-허핀달 지수를 활용한 글로벌 주요 국가의 해외건설 지역별 및 공종별 다각화 및 다변화 지수를 분석하였다. 분석결과, 글로벌 설계 및 시공기업의 해외비중이 높고, 공종별 및 지역별 다각화 정도가 높은 국가들은 유럽 선진 국가들이 대부분을 차지하고 있다. 한국은 시공기업의 공종별 전문화를 통한 다각화를 추진하고 있고, 설계기업은 공종별 및 지역별로 전문화 및 일부 지역에 편중되어 있다. 향후에는 한국의 글로벌 건설기업은 선진국과 같이 해외사업 지역 다변화 및 공종 다각화로 해외경쟁력을 강화할 필요가 있다.

• 한국경영과학회지
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• 제38권4호
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• pp.11-33
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• 2013

We analyzed the structures and properties of the global financial market networks using social network analysis approach. The Minimum Spanning Tree (MST) lengths and networks of the global financial markets based on the correlation coefficients have been analyzed. Firstly, similar to the previous studies on the global stock indices using MST length, the diversification effects in the global multi-asset portfolio can disappear during the crisis as the correlations among the asset class and within the asset class increase due to the system risks. Second, through the network visualization, we found the clustering of the asset class in the global financial markets network, which confirms the possible diversification effect in the global multi-asset portfolio. Meanwhile, we found the changes in the structure of the network during the crisis. For the last one, in terms of the degree centrality, the stock indices were the most influential to other assets in the global financial markets network, while in terms of the betweenness centrality, Gold, Silver and AUD. In the practical perspective, we propose the methods such as MST length and network visualization to monitor the change of the correlation risk for the risk management of the multi-asset portfolio.

• 한국콘텐츠학회논문지
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• 제11권3호
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• pp.100-107
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• 2011

휴리스틱 탐색에서 강화(Intensification)와 다양화(Diversification)의 조화는 중요한 연구 부분이다. 본 논문에서는 개미 집단 최적화(Ant Colony Optimization, ACO) 접근법의 하나인 개미 집단 시스템(Ant Colony System, ACS)에서 강화와 다양화의 조화를 통한 성능 향상시키는 방법을 제안한다. 제안 방법은 다양화 전략으로 전역 최적 경로가 향상되지 않는 경우 반복 탐색 구간을 고려해 상태전이 규칙의 파라미터를 변경해 탐색하고, 이러한 다양화 전략을 통해 발견된 전역 최적 경로에서 이전 전역 최적 경로와 현재 전역 최적 경로의 중복 간선에 대해 페로몬을 강화시켜 탐색하는 혼합된 탐색 방법을 제안한다. 그리고, 실험을 통해 제안된 방법이 기존 ACS-3-opt 알고리즘, ACS-Subpath 알고리즘, ACS-Iter 알고리즘, ACS-Global-Ovelap 알고리즘에 비해 최적 경로 탐색 및 평균 최적 경로 탐색의 성능이 우수함을 보여 준다.

• 4차산업연구
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• 제1권2호
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• pp.21-32
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• 2021

Purpose - International diversification, a critical issue in research and practice, undoubtedly represents a growth strategy with great potential impact on firm performance. Although the literature has widely examined the relationship between international diversification and firm performance in international business and strategic management research, it remains unconfirmed. This study, therefore, aims to clarify the relationship as it relates to information service firms. Research design, data and methodology - To examine the international diversification-performance relationship, this study uses a sample of major Korean service firms spread over four industries spanning a period of five years between 2005 and 2009. In this study. generalized least square was used to analyze the relationship between international diversification and performance of service firms. Result - The result showed the U-shaped curvilinear form between international diversification and performance in service firms. Especially, IT service firms may differ from other service firms that the negative effect of internationality may have weaker than other types of service firm. Conclusion - Based on the empirical results, the U-shape relationship between international diversification and performance is confirmed in Korea service firms. Furthermore, information service firm may reduce the initial internationalization cost by transferring codified and digitized information using information and communication technology, so that gain benefit from early international expansion.

• Journal of Contemporary Eastern Asia
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• 제20권2호
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• pp.237-258
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• 2021

The COVID-19 pandemic has highlighted the risks of an over-concentration of supply chains in one country. It has motivated stakeholders to pursue diversification strategies. However, a paradox exists. Stakeholders have shied away from a complete decoupling and preferring to selectively enhance economic ties with China. This article explores this paradox by examining supply chain concentration in China as a form of asymmetric interdependence and the countermeasures from the U.S., Japan, Australia, and India to minimize vulnerabilities. It argues that while the COVID-19 disruptions have brought to light the risk of supply chain overconcentration in China, countermeasures are also driven by coercive diplomacy and the deepening U.S.-China rivalry. The paper also examines the feasibility of diversification efforts by focusing on the capacity and capabilities of alternative supply chain hubs. It finds that while states are actively seeking ways to prevent China from using asymmetric interdependence of supply chains and trade to gain political leverage, there are structural limits to the degree of diversification in the short to mid-term.

• 산경연구논집
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• 제10권9호
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• pp.19-24
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• 2019

Purpose - In the digital era, technology advancement enables goods and services to be produced more efficiently but also create economy risk in the global economy including Indonesia. Previous studies stated that the risk can be mitigated through export diversification. This study investigates strategy to expand the markets for existing products and explore the potential market. Research design, data, and methodology - The criteria was followed using a review and considerations combination through the Focus Group Discussion (FGD) to determine the priority product in trading house of Indonesia. This study implemented market share to explore those products' markets and compare it to other ASEAN countries. Results - The Indonesian potential products are T-shirts, singlets and other vests of textile materials, knitted or crocheted (excluding cotton); food preparations; medicaments consisting of mixed or unmixed products for therapeutic or prophylactic purposes; soap in the form of flakes, granules, powder, paste or in aqueous solution; and cocoa powder, not containing added sugar or other sweetening matter. The market analysis also showed that Indonesia still had not optimally accessed yet the largest market in the world for each product. Conclusions - The government should focus more on increasing the competitiveness of those products, particularly in those global marketplaces.

• 경영과정보연구
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• 제36권1호
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• pp.291-307
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• 2017

본 연구의 목적은 글로벌기업의 국제다각화 수준의 증가가 경영자의 재량적 회계선택에 미치는 영향을 분석하고 이들의 관계가 기업가치에 어떠한 영향을 미치는지를 분석한다. 이를 위해 본 연구는 2012년부터 2015년까지 금융업을 제외한 유가증권 상장기업인 2,139 기업-연도를 표본으로 선정하여 분석을 실시하였다. 본 연구의 분석결과는 다음과 같이 요약된다. 첫째, 국제다각화 수준이 증가할수록 경영자의 재량적 회계선택의 대리변수인 재량적 발생액(discretionary accruals)이 증가하는 것을 발견하였다. 그리고 기업 내 정보비대칭과 경영자의 재량적 회계 선택이 양(+)의 관련성을 가진다는 선행연구((배종길과 김진태, 2012)를 바탕으로 국제다각화 수준과 정보비대칭의 상호작용이 경영자의 재량적 회계선택에 미치는 영향을 분석하였다. 분석결과, 국제다각화 수준 및 정보비대칭 정도가 높을수록 경영자의 재량적 회계선택의 대리변수인 재량적 발생액이 증가한다는 것을 발견하였다. 이러한 결과는 국제다각화 수준과 재량적 회계선택의 양(+)의 관련성은 경영자와 이해관계자 사이의 정보비대칭에서 기인한 결과로 해석된다. 마지막으로 국제다각화로 인한 경영자의 재량적 회계선택의 증가가 기업가치를 감소시킨다는 실증적 증거를 발견하였다. 이는 국제다각화로 인한 경영자의 재량적 회계선택이 주주 부가 아닌 경영자 자신의 사적부(보상극대화 등)를 위한 기회주의적 목적으로 활용되었고 그 결과 기업가치의 감소를 가져온 것이라 분석된다. 본 연구를 통해 해외매출 현황에 대한 공시규정을 조속히 개선해야 한다는 점과, 글로벌 기업에 대한 회계정보이용자들의 의사결정 과정에서 신중을 기해야 한다는 점에서 정책입안자 및 정보이해관계자들에게 중요한 시사점을 제공해 줄 수 있을 것이다.