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Jeong S.,Korea Institute of Machinery and Materials | Choi J.Y.,Korea Institute for Industrial Economics and Trade KIET | Kim J.-Y.,Center for International Affairs | Kim J.-Y.,International Institute For Applied Systems Analysis
Science and Public Policy | Year: 2014

International collaboration in research activities has been highlighted because it offers higher productivity and has a greater impact than non-international collaboration. Given the importance of international collaboration, researchers make strategic decisions on their collaboration modes in the light of their environments and the expected trade-offs, since long-distance research collaboration entails both costs and benefits. By using national data at the project level, this paper examines the possible factors in international collaboration in various research areas, mainly focusing on research activities by universities. Our empirical results suggest that substantial financial and attentional resources, academic excellence, individual motivation, and active informal communication play significant roles in accomplishing international collaboration. Additionally, this paper refines the understanding of the role of communication and policy in ensuring the most effective use of research resources, helping research managers to promote collaboration in an appropriate decision-making context. © The Author 2013. Published by Oxford University Press. All rights reserved.

Lee J.,University of Management and Economics | Choi J.Y.,Korea Institute for Industrial Economics and Trade KIET | Cho Y.,Inje University
International Journal of Consumer Studies | Year: 2011

Just as standards wars over formats had characterized VCRs upon introduction to the market, the next-generation DVD standards war between Blu-Ray and HD-DVD lasted 6 years before Blu-Ray won the contest. Beginning with stated preference data drawn from a structured conjoint survey conducted before Blu-Ray became the de facto standard of the next-generation DVD format, we estimate consumer preferences on digital video players. A Bayesian mixed-logit model is used and market share simulations are conducted under various scenarios based on the estimated parameters from Bayesian mixed-logit model to surmise the future South Korean digital video-player market. Results indicate that consumers feel that network size and title availability are more important than hardware-related facets of the product, such as definition and storage capacity. The level of title availability and price of the Blu-Ray player for Blu-Ray's dominance over DVD will dramatically vary by the penetration rate of DVD players. © 2011 Blackwell Publishing Ltd.

Lee J.,Korea Institute for Industrial Economics and Trade KIET | Gomez M.I.,Cornell University
Journal of Agricultural Economics | Year: 2013

We examine the impact of the end of the coffee export quota system (EQS) on international-to-retail price transmission in France, Germany and the United States. We take account of the existence of long-run threshold effects and short-run price transmission asymmetries (PTAs). We find evidence of threshold effects in both periods (EQS and post-EQS) in all three countries and the presence of short-run PTAs during the post-EQS period in all countries, but not during the EQS period. Our results indicate that the threshold values are smaller in the post-EQS period, suggesting that retail prices became more responsive to changes in international prices. However, the speed of adjustment towards the long-run equilibrium decreases during the post-EQS period in the three countries. In the short run, non-linear impulse response analyses indicate that a shock in international prices was more persistent during the EQS period than in the post-EQS period. Moreover, we find evidence of short-run PTAs in the post-EQS period, with differences across countries. We find support for the 'rockets and feathers' principle in the United States; in contrast, retail prices respond faster when international prices are falling in Germany and France. We explain these differences in terms of market structures. © 2012 The Agricultural Economics Society.

Park M.,Korea institute for Industrial Economics and Trade KIET | Jin Y.,Rutgers University | Love A.H.,Texas A&M University | Love A.H.,Norwegian University of Life Sciences
Applied Economics | Year: 2011

Causal relationships are used to investigate information flows and directions of control in a decentralized multi-echelon supply chain where no central authority has system level control over optimizing decisions. We use secondary time-series data representing the US beef industry to investigate dynamic and contemporaneous causality based on outof- sample Granger causality and Direct Acyclic Graphs (DAGs). Results indicate: (i) the US beef supply chain experienced a significant structural change in late 1996 and early 1997 that may be attributed to a weather induced production shock and an apparent turnaround of the cattle cycle; (ii) contemporaneous causalities appear to be stronger and dynamic causalities appear to be weaker after the structural change, suggesting faster and more effective information transmission along the supply chain after the structural change; (iii) contemporaneous information appears to flow from upstream to downstream tiers in the supply chain before the structural break, which reverses after the structural break, suggesting a shift in control from upstream to downstream firms; and (iv) co-use of spot market and contracts to procure strategic inputs by processors appears to allow processors some control of spot price through contract purchases in the post-break period. Our approach could be readily used to investigate other multi-echelon systems. © 2011 Taylor & Francis.

Choi J.Y.,Korea Institute for Industrial Economics and Trade KIET | Kim Y.,University of Management and Economics | Jun Y.,Korea Communications Commission
Industrial Management and Data Systems | Year: 2011

Purpose - The purpose of this paper is to reveal the core determinants and adoption patterns of the major enterprise information systems. Design/methodology/approach - This study incorporated the core representative and meaningful explanatory variables in the major previous literatures and analyzes the core determinants of businesses' adoption of the essential information systems and the substitutionary patterns among them, using a Bayesian multivariate probit model, which is based on McFadden's random utility model and capable of handling multiple response data. Findings - It was found that not only factors from the classical technological diffusion viewpoint but also factors such as organizational tools and strategic behaviors play an important role in firms' adoption of information systems. Specifically, epidemic effect generally outweighs size effect, and putting more effort into the intensity of information strategy planning is more influential than the hiring of a professional chief information officer. On the other hand, such variables as age of the firm, labor intensity, and number of PCs per person generally have no significant impacts. Finally, a relatively strong complementary relationship exists between enterprise resource planning and customer relationship management adoption, and between e-buy and groupware adoption. Originality/value - The results presented in this paper have important implications for firms on a minimal budget that want to maximize their productivity through the adoption of information systems. They also provide important information for government policymakers whose job it is to design strategies for the successful deployment of information systems. © 2011 Emerald Group Publishing Limited. All rights reserved.

Choi J.Y.,Korea Institute for Industrial Economics and Trade KIET | Shin J.,University of Management and Economics | Lee J.,University of Management and Economics
Behaviour and Information Technology | Year: 2013

Since the release of the Apple iPad and the explosion of consumer demand for tablet PCs, a number of companies are entering into the tablet PC market, creating a situation that is becoming more fiercely competitive, complex, and difficult to predict. Under the singularity of the Korean tablet PC market, into which both the iPad and Galaxy Tab (with an Android operating system) were simultaneously released, this study closely analyses consumer preferences for tablet PCs. It uses the Bayesian mixed logit model, which can reflect consumers heterogeneous preferences based on data collected from a conjoint method, and using the estimates of the consumer utility function with model verification, it offers forecasts for the tablet PC market under six likely situations. © 2013 © 2013 Taylor & Francis.

Jeong S.,Korea Institute of Machinery and Materials | Choi J.Y.,Korea Institute for Industrial Economics and Trade KIET
Scientometrics | Year: 2012

This paper suggests an empirical framework to classify research collaboration activities with developed indicators that carry on a previous theoretical framework (Wagner [Science and Technology Policy for Development,Dialogues at the Interface, 2006]; Wagner et al. [Linking effectively: Learning lessons from successful collaboration in science and technology. DB-345-OSTP, 2002]) by employing the Gaussian mixture model, an advanced probabilistic clustering analysis. By further exploring the method upon a profound evidence-based reflection of actual phenomena, this paper also proposes an exploratory analysis to manage and evaluate research projects upon their differentiated classification in a preceding perspective of research collaboration and R & D management. In addition, the results show that international collaboration tends to be associated with more evenly committed collaboration, and that collaboration featuring a higher degree of funding or dispersed commitments generally results in larger outcomes than research clustered on the opposite side of the framework. © 2012 Akadémiai Kiadó, Budapest, Hungary.

Jeong S.,Korea Institute of Machinery and Materials | Choi J.Y.,Korea Institute for Industrial Economics and Trade KIET | Kim J.,Korea Institute of Machinery and Materials
Scientometrics | Year: 2011

Given the high priority accorded to research collaboration on the assumption that it yields higher productivity and impact rates than do non-collaborative results, research collaboration modes are assessed for their benefits and costs before being executed. Researchers are accountable for selecting their collaboration modes, a decision made through strategic decision making influenced by their environments and the trade-offs among alternatives. In this context, by using bibliographic information and related internal data from the Korea Institute of Machinery and Materials (KIMM, a representative Korean government institute of mechanical research), this paper examines the suggested yet unproven determinants of research collaboration modes that the SCI data set cannot reveal through a Multinomial Probit Model. The results indicate that informal communication, cultural proximity, academic excellence, external fund inspiration, and technology development levels play significant roles in the determination of specific collaboration modes, such as sole research, internal collaboration, domestic collaboration, and international collaboration. This paper refines collaboration mode studies by describing the actual collaboration phenomenon as it occurs in research institutes and the motivations prompting research collaboration, allowing research mangers to encourage researchers to collaborate in an appropriate decision-making context. © 2011 Akadémiai Kiadó, Budapest, Hungary.

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