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Youngsang Cho
Department of Industrial Engineering, College of Engineering, Yonsei University, 50 Yonsei-Ro, Seodaemun-gu, Seoul 120-749, South Korea

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Journal article
Published: 21 May 2021 in Telematics and Informatics
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Connected and autonomous vehicles (CAVs) and intelligent transport systems are transforming individual driving behavior and thus, the vehicle industry and transport sector. However, increasing vehicle connectivity makes CAVs more susceptible to cyber-attacks, which is a barrier to consumers’ CAV adoption. This study analyzes the types of information security threats consumers consider to be the most dangerous and consumer preference for the information security solution that protects their CAVs from such information security threats. We use stated preference data from a discrete choice experiment and a mixed logit model to reflect consumers’ heterogeneity on information security threats and solutions. Furthermore, we investigate the effects of experiencing privacy leakage on attitudes toward CAV information security threats by dividing respondents into two groups. The results show that consumers regard communication failure and the unauthorized collection of personal information as dangerous information security threats, which implies that confidentiality and availability are more essential to CAV security than other factors. Moreover, convenience of use, such as having automatic updates and a security dashboard, is also important when purchasing a CAV information security solution. We also find that respondents who have experienced privacy leakage have a higher preference for protecting CAVs from information security threats than those who have not.

ACS Style

Kyuho Maeng; Woojae Kim; Youngsang Cho. Consumers’ attitudes toward information security threats against connected and autonomous vehicles. Telematics and Informatics 2021, 63, 101646 .

AMA Style

Kyuho Maeng, Woojae Kim, Youngsang Cho. Consumers’ attitudes toward information security threats against connected and autonomous vehicles. Telematics and Informatics. 2021; 63 ():101646.

Chicago/Turabian Style

Kyuho Maeng; Woojae Kim; Youngsang Cho. 2021. "Consumers’ attitudes toward information security threats against connected and autonomous vehicles." Telematics and Informatics 63, no. : 101646.

Journal article
Published: 10 November 2020 in Research in Transportation Economics
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A direct or indirect network effect is defined as the phenomenon where the number of users of a product/service or the number of complementary products of a product/service increases the value of that product/service. In case of connected and autonomous vehicles (CAVs), the value to consumers is positively affected by the number of users and interoperable road facilities, so the network effect is important in CAV diffusion. In this study, we empirically analyzed the direct and indirect network effects on CAV adoption from the perspective of consumer preference. We conducted a choice experiment and derived the consumer utility function with a mixed logit model. We considered the percentage of CAVs on the road (i.e., the number of CAV users) and ICT infrastructure coverage (i.e., the level of complimentary CAV services) for the direct and indirect network effect, exclusive CAV lanes, autonomous driving technology, fuel efficiency, and price as key attributes of CAVs. We found empirical evidence that there is extensive heterogeneity among consumers regarding CAV attributes, and that potential CAV consumers are influenced highly by the indirect network effect followed by the direct network effect. Based on scenario analyses, we suggest some government policies and corporate strategies for CAV market.

ACS Style

Kyuho Maeng; Seung Ryong Jeon; Taeho Park; Youngsang Cho. Network effects of connected and autonomous vehicles in South Korea: A consumer preference approach. Research in Transportation Economics 2020, 100998 .

AMA Style

Kyuho Maeng, Seung Ryong Jeon, Taeho Park, Youngsang Cho. Network effects of connected and autonomous vehicles in South Korea: A consumer preference approach. Research in Transportation Economics. 2020; ():100998.

Chicago/Turabian Style

Kyuho Maeng; Seung Ryong Jeon; Taeho Park; Youngsang Cho. 2020. "Network effects of connected and autonomous vehicles in South Korea: A consumer preference approach." Research in Transportation Economics , no. : 100998.

Journal article
Published: 17 August 2020 in Energies
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Global trends and prospects of environmentally friendly transportation have helped to popularize electric vehicles (EVs). With the spread of EVs, vehicle-to-grid (V2G) technology is gaining importance for its role in connecting the electricity stored in the battery of EVs to a grid-like energy storage system (ESS). Electricity generation mix and battery for V2G energy storage have a decisive effect on the stabilization of a V2G system, but no attempt has been made. Therefore, this study analyzes consumer preference considering the electricity generation mix and battery for the V2G. We conduct a conjoint survey of a 1000 South Koreans and employ the multiple discrete-continuous extreme value model. The results show that drivers prefer plug-in hybrid- and battery EVs to other vehicles. Additionally, findings show that driver’s utility changes at 27.9% of the battery allowance for V2G system and it becomes positive after 55.7%. Furthermore, we conduct a scenario analysis considering the electricity generation mix (more traditional vs. renewable) and battery allowance. Based on this analysis, we suggest some policies and corporate strategies to support the success of the V2G market depending on energy policies and battery allowance level.

ACS Style

Kyuho Maeng; Sungmin Ko; Jungwoo Shin; Youngsang Cho. How Much Electricity Sharing Will Electric Vehicle Owners Allow from Their Battery? Incorporating Vehicle-to-Grid Technology and Electricity Generation Mix. Energies 2020, 13, 4248 .

AMA Style

Kyuho Maeng, Sungmin Ko, Jungwoo Shin, Youngsang Cho. How Much Electricity Sharing Will Electric Vehicle Owners Allow from Their Battery? Incorporating Vehicle-to-Grid Technology and Electricity Generation Mix. Energies. 2020; 13 (16):4248.

Chicago/Turabian Style

Kyuho Maeng; Sungmin Ko; Jungwoo Shin; Youngsang Cho. 2020. "How Much Electricity Sharing Will Electric Vehicle Owners Allow from Their Battery? Incorporating Vehicle-to-Grid Technology and Electricity Generation Mix." Energies 13, no. 16: 4248.

Research article
Published: 25 November 2019 in Business Strategy and the Environment
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In a bid to reduce greenhouse gas emissions, several countries worldwide are implementing policies to promote electric vehicles (EVs). However, contrary to expectations, the diffusion speed of EVs has been rather slow in South Korea. This study analyzes consumer preferences for the technological and environmental attributes of EVs and derives policy and environmental implications to promote market diffusion of EVs in South Korea. We conduct a choice‐based conjoint survey of 1,008 consumers in South Korea and estimate the consumer utility function using a mixed logit model considering consumer heterogeneity. Based on the consumer utility function, we analyze consumers' willingness‐to‐pay (WTP) for EV attributes such as driving range, charging method, charging time, autonomous driving function, carbon dioxide (CO2) reduction rate, and purchase price. The results indicate that the current low acceptance of EVs is due to their relatively high price and lack of a battery charging technology that satisfies consumers' expectations of the charging method and time. One interesting finding is that Korean consumers have a relatively higher WTP for the CO2 reduction rate of EVs than consumers in other countries; however, they do not consider CO2 reduction over other technological attributes when choosing EVs. This implies that the rate of CO2 reduction of EVs is not an important factor for South Korean consumers when buying EVs. We also calculate the effect of CO2 reduction with the market penetration of EVs and find that CO2 reduction through the diffusion of EVs depends on the country's electricity generation mix.

ACS Style

Yujin Beak; Kayoung Kim; Kyuho Maeng; Youngsang Cho. Is the environment‐friendly factor attractive to customers when purchasing electric vehicles? Evidence from South Korea. Business Strategy and the Environment 2019, 29, 996 -1006.

AMA Style

Yujin Beak, Kayoung Kim, Kyuho Maeng, Youngsang Cho. Is the environment‐friendly factor attractive to customers when purchasing electric vehicles? Evidence from South Korea. Business Strategy and the Environment. 2019; 29 (3):996-1006.

Chicago/Turabian Style

Yujin Beak; Kayoung Kim; Kyuho Maeng; Youngsang Cho. 2019. "Is the environment‐friendly factor attractive to customers when purchasing electric vehicles? Evidence from South Korea." Business Strategy and the Environment 29, no. 3: 996-1006.

Journal article
Published: 22 October 2019 in Energy Policy
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The peer-to-peer (P2P) electricity trading platform (ETP) is an electricity-sharing system by which individuals can sell surplus electricity or purchase electricity to meet a deficit in a regional power network. South Korea has allowed energy prosumers to engage in electricity trading from 2016 and is seeking ways to vitalize the electricity trading market. This study aims to estimate the willingness to pay (WTP) of respondents for the monthly usage of P2P ETP by using the contingent valuation method. Of the 1000 Korean respondents, 639 were willing to pay a fee for using the platform. The estimated WTP is KRW 5958.86 (USD 5.50) per month. Moreover, the estimated WTP is higher in respondents who have more background knowledge of the P2P ETP and who pay higher electricity fees. The estimated WTP is lower than the usage fees of existing ETPs in other countries, which is primarily due to Korea's low electricity prices. Furthermore, the estimation results show that enhancing consumer awareness of P2P trading and introducing market strategies based on electricity usage should be considered by electricity trading companies and regulators to enhance P2P ETP usage.

ACS Style

Juyong Lee; Youngsang Cho. Estimation of the usage fee for peer-to-peer electricity trading platform: The case of South Korea. Energy Policy 2019, 136, 111050 .

AMA Style

Juyong Lee, Youngsang Cho. Estimation of the usage fee for peer-to-peer electricity trading platform: The case of South Korea. Energy Policy. 2019; 136 ():111050.

Chicago/Turabian Style

Juyong Lee; Youngsang Cho. 2019. "Estimation of the usage fee for peer-to-peer electricity trading platform: The case of South Korea." Energy Policy 136, no. : 111050.

Journal article
Published: 17 January 2019 in Energies
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The necessity for energy research and development (ER&D) is increasing as greenhouse gases and climate change are becoming global issues. To support sustainable economic growth through ER&D, it is necessary to examine the optimal ratio of ER&D investment to total R&D investment to maximize economic growth. However, there are no studies on the appropriate level of ER&D in total R&D investment for economic growth. This study attempts to empirically estimate the optimal ratio of ER&D investment to maximize gross domestic product (GDP) in South Korea. We utilized the Cobb-Douglas production function for our econometric model and corrected the autocorrelation problem using the Cochrane-Orcutt iterative procedure. Our results showed that both, ER&D and non-ER&D have positive correlations with GDP. The optimal ratio of ER&D is derived as 13.23%, which indicates that the current ratio of Korean ER&D should be revised upward. Further, ER&D investment in the private sector needs to be increased to achieve the optimal ratio because the current statistics in Korea describes that private companies in the energy industry invest much less in R&D than the government. Based on the results, we suggest government strategies to enhance ER&D investment in the private sector as well as the public sector.

ACS Style

Juyong Lee; Youngsang Cho; Jungwoo Shin. A Study on the Optimal Ratio of Research and Development Investment in the Energy Sector: An Empirical Analysis in South Korea. Energies 2019, 12, 288 .

AMA Style

Juyong Lee, Youngsang Cho, Jungwoo Shin. A Study on the Optimal Ratio of Research and Development Investment in the Energy Sector: An Empirical Analysis in South Korea. Energies. 2019; 12 (2):288.

Chicago/Turabian Style

Juyong Lee; Youngsang Cho; Jungwoo Shin. 2019. "A Study on the Optimal Ratio of Research and Development Investment in the Energy Sector: An Empirical Analysis in South Korea." Energies 12, no. 2: 288.

Journal article
Published: 10 September 2018 in Sustainability
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In this study, we analyzed the effects of electricity market reform on investment in generation facilities. We used the data of 27 OECD member countries and considered ownership structure, horizontal and vertical unbundling, change of transaction method, and government regulation as explanatory variables for market reform. We used four regression models, in which we examined the effects of market reform on the capacity of generation facilities, supply reserve ratio, total investment, and base-load share, respectively. For each panel regression model, we performed a Hausman test to identify the model between random effect and fixed effect. Based on the estimation results, we found that electricity market reform has a negative effect on generation facilities in most countries. Both privatization and regulation have negative impacts on the generation facility and base-load share. On the other hand, the level of liberalization of transactions have positive effects on the generation facility, supply reserve ratio, and base-load share. The empirical analysis also showed that horizontal unbundling does not have a meaningful effect on investment, but vertical unbundling contributes to increasing the supply reserve ratio.

ACS Style

Juyong Lee; Youngsang Cho; Yoonmo Koo; Chansoo Park. Effects of Market Reform on Facility Investment in Electric Power Industry: Panel Data Analysis of 27 Countries. Sustainability 2018, 10, 3235 .

AMA Style

Juyong Lee, Youngsang Cho, Yoonmo Koo, Chansoo Park. Effects of Market Reform on Facility Investment in Electric Power Industry: Panel Data Analysis of 27 Countries. Sustainability. 2018; 10 (9):3235.

Chicago/Turabian Style

Juyong Lee; Youngsang Cho; Yoonmo Koo; Chansoo Park. 2018. "Effects of Market Reform on Facility Investment in Electric Power Industry: Panel Data Analysis of 27 Countries." Sustainability 10, no. 9: 3235.

Journal article
Published: 01 April 2018 in Telecommunications Policy
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ACS Style

Juyong Lee; Youngsang Cho. Inconvenience cost of mobile communication failure: The case of South Korea. Telecommunications Policy 2018, 42, 241 -252.

AMA Style

Juyong Lee, Youngsang Cho. Inconvenience cost of mobile communication failure: The case of South Korea. Telecommunications Policy. 2018; 42 (3):241-252.

Chicago/Turabian Style

Juyong Lee; Youngsang Cho. 2018. "Inconvenience cost of mobile communication failure: The case of South Korea." Telecommunications Policy 42, no. 3: 241-252.

Original articles
Published: 30 October 2015 in Applied Economics
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Public investments in healthcare technology for the disabled and elderly to improve the quality of social life have been vigorous, but the economic evaluation of the assistive technology is still lacking. Under this circumstance, the purpose of this study is to analyse the socio-economic value of developing assistive technologies with the potential to improve the quality of social life, especially for disabled and elderly individuals. Based on a survey of 400 respondents, the spike model, a special form of the contingent valuation method (CVM) is applied to assess the value of assistive technologies. In Korea, a household’s willingness-to-pay (WTP) for the development of assistive technologies is US$4.26 per year, on average, in the form of a government-levied tax; although many people express zero WTP for the development of these technologies, people with higher household savings, higher levels of education and higher levels of charity donations have a higher WTP for the development of assistive technology. We conclude that although assistive technologies have considerable economic value many people express zero WTP for the development of these technologies. Therefore, political and social educational efforts are necessary to reach social consensus on the government investment in such technologies.

ACS Style

Jungwoo Shin; Yeunjoong Kim; Heekoo Nam; Youngsang Cho. Economic evaluation of healthcare technology improving the quality of social life: the case of assistive technology for the disabled and elderly. Applied Economics 2015, 48, 1361 -1371.

AMA Style

Jungwoo Shin, Yeunjoong Kim, Heekoo Nam, Youngsang Cho. Economic evaluation of healthcare technology improving the quality of social life: the case of assistive technology for the disabled and elderly. Applied Economics. 2015; 48 (15):1361-1371.

Chicago/Turabian Style

Jungwoo Shin; Yeunjoong Kim; Heekoo Nam; Youngsang Cho. 2015. "Economic evaluation of healthcare technology improving the quality of social life: the case of assistive technology for the disabled and elderly." Applied Economics 48, no. 15: 1361-1371.

Journal article
Published: 01 January 2015 in Energy Policy
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ACS Style

Kayoung Kim; Heekoo Nam; Youngsang Cho. Estimation of the inconvenience cost of a rolling blackout in the residential sector: The case of South Korea. Energy Policy 2015, 76, 76 -86.

AMA Style

Kayoung Kim, Heekoo Nam, Youngsang Cho. Estimation of the inconvenience cost of a rolling blackout in the residential sector: The case of South Korea. Energy Policy. 2015; 76 ():76-86.

Chicago/Turabian Style

Kayoung Kim; Heekoo Nam; Youngsang Cho. 2015. "Estimation of the inconvenience cost of a rolling blackout in the residential sector: The case of South Korea." Energy Policy 76, no. : 76-86.

Journal article
Published: 01 October 2014 in Technological Forecasting and Social Change
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ACS Style

Yoonmo Koo; Sesil Lim; Kayoung Kim; Youngsang Cho. Analysis of user characteristics regarding social network services in South Korea using the multivariate probit model. Technological Forecasting and Social Change 2014, 88, 232 -240.

AMA Style

Yoonmo Koo, Sesil Lim, Kayoung Kim, Youngsang Cho. Analysis of user characteristics regarding social network services in South Korea using the multivariate probit model. Technological Forecasting and Social Change. 2014; 88 ():232-240.

Chicago/Turabian Style

Yoonmo Koo; Sesil Lim; Kayoung Kim; Youngsang Cho. 2014. "Analysis of user characteristics regarding social network services in South Korea using the multivariate probit model." Technological Forecasting and Social Change 88, no. : 232-240.

Journal article
Published: 31 July 2013 in Transportation Research Part D: Transport and Environment
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This study analyzes consumer preferences for a new incentive program based on a point card to promote green consumption; the study also examines the program’s impact on bus utilization in South Korea. An ex-ante analysis was conducted to examine how consumer behavior can be modified based on varying incentive levels of the point card system. In addition, the effect of the system on consumers’ public transport utilization and resulting CO2 emissions reductions are analyzed. The adoption probability of the point card is forecast at about 93%, and annual CO2 emissions are forecast to decrease by 610 kt CO2.

ACS Style

Yoonmo Koo; MiSuk Lee; Youngsang Cho. A point card system for public transport utilization in Korea. Transportation Research Part D: Transport and Environment 2013, 22, 70 -74.

AMA Style

Yoonmo Koo, MiSuk Lee, Youngsang Cho. A point card system for public transport utilization in Korea. Transportation Research Part D: Transport and Environment. 2013; 22 ():70-74.

Chicago/Turabian Style

Yoonmo Koo; MiSuk Lee; Youngsang Cho. 2013. "A point card system for public transport utilization in Korea." Transportation Research Part D: Transport and Environment 22, no. : 70-74.

Journal article
Published: 01 September 2012 in Technological Forecasting and Social Change
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ACS Style

Youngsang Cho; Yoonmo Koo. Investigation of the effect of secondary market on the diffusion of innovation. Technological Forecasting and Social Change 2012, 79, 1362 -1371.

AMA Style

Youngsang Cho, Yoonmo Koo. Investigation of the effect of secondary market on the diffusion of innovation. Technological Forecasting and Social Change. 2012; 79 (7):1362-1371.

Chicago/Turabian Style

Youngsang Cho; Yoonmo Koo. 2012. "Investigation of the effect of secondary market on the diffusion of innovation." Technological Forecasting and Social Change 79, no. 7: 1362-1371.