Technical innovation and 3.5 mobile phone generation: Lessons from Korea

In 1996, the Korean mobile communication market was the first in the world to commercialize the code division multiple access (CDMA). Since then, the voice-based mobile phone market has continued to grow and has now reached near saturation. Having recognized the potential of the mobile data service as a new source of profit, telecommunication operators are scrambling to evolve 3.5 generation (3.5G) technology in order to lead market competition. Recently, the Korean 3.5G mobile telecom market has faced stiff competition from CDMA-based EVDO Rev.A and global system for mobile telecommunications (GSM)-based high-speed downlink packet access (HSDPA). In addition, the world's first wireless LAN-based wireless broadband internet (WiBro) service was commercialized in June, 2006. This paper reviews the current status of the 3.5G technology and analyzes the service standardization strategies from the viewpoint of technological evolutions. This paper also suggests implications for Korea's specific circumstances where different mobile telecom technologies complement and compete with one another. Korea's experiences may serve as important lessons for other countries or operators who try to introduce the 3G and look beyond mobile telecom technologies.     

韩国政府为实现环保型企业经营的政策及方案

文章论述了环境问题对人类的重要性及创造环保型的企业环境需要解决的问题,在此基础上,提 出了为实现环保型企业经营韩国政府所应该采用的政策及具体的实施方案。     

The conservative equal costs rule, the serial cost sharing rule and the pivotal mechanism: asymptotic welfare loss comparisons for the case of an excludable public project

We examine the asymptotic behavior of two strategyproof mechanisms discussed by Moulin for public goods – the conservative equal costs rule (CER) and the serial cost sharing rule (SCSR) – and compare their performance to that of the pivotal mechanism (PM) from the Clarke–Groves family. Allowing the individuals’ valuations for an excludable public project to be random variables, we show under very general assumptions that expected welfare loss generated by the CER, as the size of the population increases, becomes arbitrarily large. However, all moments of the SCSR’s random welfare loss asymptotically converge to zero. The PM does better than the SCSR, with its welfare loss converging even more rapidly to zero.     

Do External Knowledge Sourcing Modes Matter for Service Innovation? Empirical Evidence from South Korean Service Firms

To source external knowledge, firms in the service area use various sourcing modes simultaneously suitable for their internal needs or external environments. Each external knowledge sourcing mode has distinctive characteristics, and as such, they can offer different advantages and/or disadvantages to the firms. Thus, the effects of external knowledge sourcing on service innovation may vary depending on the sourcing modes. The current study aims to empirically examine the different effects of various external knowledge sourcing modes on service innovation. The study identifies three external knowledge sourcing modes: joint development, technology purchasing, and external information acquisition. Three hypotheses are established to examine the relationships between the extent of utilizing each mode and service innovation performance in terms of new service introduction. The data for analysis are selected from the “Korean Innovation Survey 2006: Service Sector” (KIS 2006). It is regarded as South Korea's version of the Community Innovation Survey (CIS). The KIS 2006 data set covers joint development, technology purchasing, and external information acquisition activities of corporations in the service sector in South Korea. The study empirically analyzes the data set using a negative binomial regression model. The results first demonstrate that the extent of the joint development has an inverted U‐shaped relationship with the service innovation performance. Second, the results indicate that, on the other hand, service innovation performance decreases with the increase to the extent of the technology purchasing when the extent is below the threshold. On the other hand, it increases with the increase to the extent of the technology purchasing; this occurs when the extent exceeds the threshold. Third, the results show that external information acquisition has a positive effect on service innovation performance. These findings support that the extent of utilizing each mode has different relationships with service innovation performance. The findings suggest that service firms need to utilize joint development at a moderate level, active technology purchasing, and as much external information acquisition as possible to maximize service innovation performance. In practice, this finding can help managers of service firms select appropriate external knowledge sourcing modes and determine the optimum level of use for each mode. This study also can help firms build up strategies for external knowledge sourcing.     

Decomposing Impression from Attitude in Relationship Management Outcomes

This study expands relationship management theory by testing the linkages between perceived relational quality, organizational impression, and attitude in affecting the behavioral intention of customer public of five major banks. A survey of 1,178 banking customers showed that perceived relational quality, organizational impression, and individual attitude, significantly affected supportive behaviors. Organizational impression was found to be almost three times more determinant than perceived relational quality in affecting individuals' attitudes, and subsequently, their supportive behaviors. By highlighting the role of organizational impression, linkages between the relationship management perspective and other theoretical frameworks, such as image repair, become apparent; bearing implications for scholarship and practice.     

Does Investor Sentiment Affect the Value Relevance of Accounting Information?

We investigate whether investor sentiment affects the relationships between accounting variables and contemporaneous stock returns. Using price-relevant accounting variables identified by Chen and Zhang (2007) and the investor sentiment index constructed by Baker and Wurgler (2006), we find that the value relevance of accounting variables is collectively lower in high sentiment periods than in low sentiment periods. More importantly, earnings yield appears to be more related to contemporaneous stock returns in high sentiment periods, while other accounting variables are more related to stock returns in low sentiment periods. The effect of investor sentiment on the value relevance of accounting information is stronger for firms that are more difficult to value and to arbitrage.     

Motivations and Use Context in Mobile Tourism Shopping: Applying Contingency and Task–Technology Fit Theories

Mobile tourism shopping is an emerging market, but there is little theoretically based research on the topic. This study investigates the impact of motivations (value, enjoyment, time saving and mobility) on consumer satisfaction by applying contingency and task–technology fit theories in the mobile tourism shopping context. The results show that value and enjoyment have significant effects on satisfaction. Use context is found to have a full mediating role between time saving and satisfaction as well as between mobility and satisfaction. This study offers theoretical and practical contributions to the tourism literature and mobile tourism industry. Copyright © 2013 John Wiley & Sons, Ltd.     

Are college education and job experience complements or substitutes? Evidence from hedge fund portfolio performance

Review of Quantitative Finance and Accounting - We examine, for various educational characteristics of hedge fund managers, the performance profile of hedge fund portfolios along their...     

亚洲国家视野下的中国历史基体——兼论从日本、韩国和越南发展研究视角的可能性

针对中国研究文献中认为中国具有某种本体或历史基体的惯常假设,同时包括中文和英文文献,但尤其重视日本文献,作者对中国历史基体的论述进行了分析,并将沟口雄三具体提出的中国历史基体的主张作为反省的对象,旨在分析他提出历史基体论的动机,即要摆脱因为日本自身历史脉络对日本学者认识中国所造成的限制。作者以韩国学者研究朝贡关系为案例,对历史基体论这一学术议题提出了质疑,并佐以越南的两位中国学专家的观点进行了比较,认为对基体论进行检视有助于中国研究取得知识启示。     

The effects of acculturation and uncertainty avoidance on foreign resident choice for Korean foods

This study attempts to identify dining-out patterns among foreign residents in South Korea, examining the differences in foreign residents’ attitudes toward Korean foods and behavioral intentions to patronize Korean restaurants based on their acculturation and uncertainty avoidance levels. The results show that foreign residents in South Korea dine out frequently and intend to revisit Korean restaurants. However, the high acculturation group has a more positive attitude toward, better understanding of, and more preference for Korean foods than the low acculturation group. Satisfaction, revisiting, and recommendation intentions for Korean restaurants are higher among the high acculturation group than the low. The low uncertainty avoidance group spends more money for dining out than the high uncertainty avoidance group, who perceive Korean foods as expensive. Attitudes toward, understanding of, and preference for Korean foods, do not differ significantly between the two uncertainty avoidance groups; nor do satisfaction and behavioral intentions to Korean restaurants.