Under Trump and Biden, the US trade policy has veered away from its traditional approach, developed since World War II, from multilateralism to focusing primarily on national and unilateral concerns. At the center of this approach have been tensions with China. This includes a renewal of industrial policies, protectionism and, most importantly, reliance on national security, manifested by newer and unexpected geopolitical developments. The discussion of trade policy today has become very toxic, especially during this presidential campaign season, with its renewed focus on tariffs. The trade debate in the US is now entering a new stage with the nomination of Kamala Harris and J.D. Vance. I believe the US drift away from the postwar policies of promoting global trade and investment will continue. Nationalist and protectionist policies will continue as part of a new economic and industrial policy, fused with national security concerns and rhetoric, no matter who wins.

In the U.S. restaurant industry where businesses struggle for survival, differentiation is considered key for success. However, there is limited research on measuring how unique or exotic a specific restaurant cuisine is perceived, since such perceptions vary by markets. In this paper, authors utilize digital geolocation history from social media records of restaurant visits across 40 types of restaurants in Chicago and San Francisco, and a two parameter Item Response Theory model to identify a) restaurants that are unique and considered more or less “difficult” to get to, and b) visitors who have more or less diverse palates. Further, palate diversity is explained by user demographics, restaurant selection criterion and behavior. Managerial implications and limitations are discussed.

In the area around Jeju Island, the squid jigging fishery and the hair-tail angling are popular. Therefore, the study on the characteristics of the formation and shift of fishing grounds is very important. We have received and analyzed AIS data of all vessels around Jeju Island from October 16, 2016 to October 16, 2017, and extracted the positions of the fishing vessels with the same operational characteristics as the fishing vessels of their fisheries. The distribution chart of the frequency of fishing vessels appearing in each predefined fishing grid (1 NM × 1 NM) was analyzed. So we took a analogy with the monthly shift of fishing grounds. Many fishing vessels appeared in the seas around Jeju Island from November 2016 to January 2017, and the frequency of their appearance was maintained. In November, however, fishing vessels were mostly concentrated in coastal waters. Yet, the density gradually weakened as they moved into January. From February, the frequency itself began to decline, making it the worst in April. The high concentration of fishing vessels in the waters leading from Jeju Island's northwest coast to south coast in November is believed to be related to the yellowtail fishery that are formed annually in the coastal waters off the island of Marado. In May 2017, the appearance frequency of fishing vessels increased and began to show a concentration in coastal waters around Jeju Island. Fishing vessels began to flock in waters northwest of Jeju Island beginning in July and peaked in August, and by September, fishing vessels were moving south along the coast of Jeju Island, weakening the density and spreading out. Between July and August, fishing vessels were concentrated in waters surrounding Jeju Island, which is believed to be related to the operations of fishing vessels for the squid jigging fishery and the hair-tail angling.

본 연구에서는 미국기업의 환경관련 CSR 공시가 해당 주식시장 성과에 미치는 장기효과를 분석 하였다. Flammer (2013) 연구의 환경관련 공시 리스트를 적용하여, 1950년 1월부터 2012년 12월까지 미국 55개 산업군에 속한 14,662개 현존기업의 월별 주식수익률 자료를 통합한 패널데 이터를 생성하였다. 본 연구의 실증분석은 환경관련 기업공시자료의 DID분석과 Four-factor CAMP 분석을 통해 수행하였다. 실증분석 결과, 베타추정이 보다 유의하였으며, 모멘텀 요인들 역 시 높은 유의수준을 보였으나, 부정적인 영향을 미치는 것으로 나타났다. 이와는 달리, 개별기업의 환경공시에 대한 DID 분석은 유의하지 않았으며, 표본선택과도 일치하지 않았다. 본 연구결과는 기업의 환경관련 CSR 공시가 단기적으로 초과수익률을 변화시킬 수 있음을 입증하였으나, 균형상 태로 회귀하려는 수익률 모멘텀을 극복하고 투자자의 장기적인 인식을 변화시키는 것은 역부족임 을 설명하고 있다.

With the advances in digital and social media technologies, sportswear and athletic shoe brands have provided more technology-based services to their consumers (Do et al., 2015). Accordingly, the importance of direct-to-consumer (DTC) sales has been increased, especially DTC sales through social media and mobile technologies. In the case of Nike, the relative contribution of DTC sales has been increased over the last few years in comparison to the sales to wholesalers while sales to wholesalers are still the primary revenue source (Soni, 2014). Despite the increasing importance of DTC sales, Nike is lagging in the market in terms of the ratio of DTC revenue to total revenue as opposed to its competitors (Soni, 2014). In response, Nike has implemented various DTC initiatives using digital and social media to facilitate demand creation and maintain market dominance (Guard, 2013; Heitner, 2016; Soni, 2014). In an effort to increase the DTC revenues, Nike introduced the new Nike+ app in 2016; however, the new app has been not well received by the public due to some functionality and gamification issues (Welch, 2016). Given the importance of the mobile apps’ forefront role for any sports brand, it is critical to understand what influence the adoption and use of the brand apps in order to increase the user satisfaction level and adoption. Thus, the current study examined factors influencing consumers’ use of a sports brand app using the modified technology acceptance model (Davis et al., 1992; Ha et al., 2015; Kim et al., 2017). Data were collected from 261 Nike+ Run Club app users using convenience sampling method. Of 216 app users, 133 respondents (51%) were female 129 were male (49%). About 64.8% were between the ages of 20 and 39 years and 35.2% were aged over 40 years. All respondents had previous experience with the Nike+ app. The questionnaire included the scales that measure perceived enjoyment, perceived ease of use, perceived usefulness, intention to use, and actual usage frequency as well as personal information. Harman’s single factor test was conducted to examine a possibility of the common method variance (MacKenzie & Podsakoff, 2012). Data were primarily analyzed using partial least squares structural equation modeling (PLS-SEM) and multi-group analysis (PLS-MGA). PLS algorithm procedures were performed to examine the hypothesized relationships in the research model (Ringle et al., 2015). The level of enjoyment had a significant positive effect on perceived ease of use (beta = .58, t = 11.94) while perceived ease of use positively affected perceived usefulness (beta = .58, t = 9.81). Behavioral intention was significantly influenced by perceived enjoyment (beta = .45, t = 7.46), followed by perceived usefulness (beta = .32, t = 3.64), and perceived ease of use (beta = .16, t = 2.07). As expected, behavioral intention positively affected actual behavior (beta = .31, t = 5.90). PLS-MGA was conducted to explore the differences between three age groups; 20s (n = 78), 30s (n = 91) and over 40 (n = 92), in regard to the use of a sports brand app. The relationship between variables was stronger with younger age groups, except the relationship between perceived enjoyment and behavioral intention. The greater the age, the greater the influence of perceived enjoyment on behavioral intention. However, only the path from perceived ease of use to behavioral intention was significantly different between the 20s and above 40 groups. The present study provides evidence supporting the efficacy of the modified TAM for predicting behavioral intention and actual use in the context of a sports brand app. In general, results from the current study suggest that perceived enjoyment is a more powerful predictor than perceived ease of use and perceived usefulness. In this regard, the concept of gamification should be tactically applied when developing and improving a sports brand app in order to create engaging experience with enjoyment (Hofacker et al., 2016; Zichermann & Cunningham, 2011). Also, given that perceived usefulness is greatly influenced by confirmation of expectations, the sports brand app provider should conduct a more thorough market research to understand what is expected by app users and ways to meet their expectations (Yoon & Rolland, 2015). In addition, the current study found some evidences of age-related differences in the adoption and use of a sports brand app (Ha et al., 2015). More detailed results and discussion will be presented at the conference.

본 연구에서는 파 주기와 기울기에 따른 단일 실린더와 다중 실린더의 wave run-up을 추정하였다. 3차원 비압축성 점성 난류 유동이며 서로 다른 상을 가지는 이상유체에 대한 수치해석을 수행하기 위하여, 본 연구에서는 전산 유체 역학 상용코드인 “STAR-CCM+”을 기반으로 하여 VOF기법과 realizable k-ε 난류 모델을 사용하였다. 모델스케일에 대한 파 주기는 단일 실린더의 경우 1.269초와 1.692초이고, 다중 실린더의 경우 1.716초이다. 각 케이스 별로 1/30, 1/16의 파 기울기를 가진다. 최종적으로 파 기울기와 주기에 대한 wave run-up 추정 결과는 관련 실험 결과와 비교하였다. 수치해석 결과는 실험과 비교하여 정성적으로 유사함을 확인하였다.