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This paper is a survey of recent academic developments in the literature on green bonds, which have become an important financial instrument in socially responsible investment. This study provides a review of papers that study the market pricing of green bonds, the economic and environmental effects of green bond financing, as well as legal and institutional issues in the green bond market. The literature on market pricing focuses mainly on the existence of greenium, which represents the extent to which green bonds carry a price premium over otherwise identical non-green counterparts. The literature on the economic and environmental effects mainly concerns stock market reaction to green bond issuance and associated economic value implications to other stakeholders, as well as investment in green projects. This paper discusses current issues in the green-bond market and avenues for future research.

The authors estimate systemic risk in the Korean economy using the econometric measures of commonality and connectedness applied to stock returns. To assess potential systemic risk concerns arising from the high concentration of the economy in large business groups and a few export-oriented sectors, the authors perform three levels of estimation using individual stocks, business groups, and industry returns. The results show that the measures perform well over the study’s sample period by indicating heightened levels of commonality and interconnectedness during crisis periods. In out-of-sample tests, the measures can predict future losses in the stock market during the crises. The authors also provide the recent readings of their measures at the market, chaebol, and industry levels. Although the measures indicate systemic risk is not a major concern in Korea, as they tend to be at the lowest level since 1998, there is an increasing trend in commonality and connectedness since 2017. Samsung and SK exhibit increasing degrees of commonality and connectedness, perhaps because of their heavy dependence on a few major member firms. Commonality in the finance industry has not subsided since the financial crisis, suggesting that systemic risk is still a concern in the banking sector.

This paper investigates a retrospective on the Journal of Derivatives and Quantitative Studies (JDQS) on its 30th anniversary based on bibliometric. JDQSs yearly publications, citations, impact factors, and centrality indices grew up in early 2010s, and diminished in 2020. Keyword network analysis reveals the JDQS's main keywords including behavioral finance, implied volatility, information asymmetry, price discovery, KOSPI200 futures, volatility, and KOSPI200 options. Citations of JDQS articles are mainly driven by article age, demeaned age squared, conference, nonacademic authors and language. In comparison between number of views and downloads for JDQS articles, we find that recent changes in publisher and editorial and publishing policies have increased visibility of JDQS.

This paper aims to analyse the adoption of fitness wearables by using the unified theory of acceptance and use of technology (UTAUT). The study analyses the relative weights and causal combinations of antecedent variables on use and intention to use fitness wearables.

The study design involves two stages: first, from the perspective of variable-oriented analysis, a structural equation model is tested using partial least squares (PLS) technique on a sample of 176 adopters and a second sample of 187 non-adopters. Second, from the perspective of case-oriented analysis, a fuzzy set qualitative comparative analysis (fsQCA) identifies causal combinations of variables that lead to use of wearables by adopters and intention to use by non-adopters.

PLS results show that performance expectancy and effort expectancy have high net effects on use and intention to use for adopters. FsQCA analysis shows that current users follow a streamlined path to adoption. High beliefs on performance expectancy and effort expectancy are the main influences of intention to use a fitness wearable for non-adopters. In contrast to adopters, non-adopters may follow a number of paths to intention to use through performance expectancy, effort expectancy or facilitating conditions. This insight was apparent only after analysing the data sets by using fsQCA.

For sake of parsimony, this paper tested UTAUT model instead of the more complex unified theory of acceptance and use of technology 2.

Marketers in the fitness category can enhance use and intention to use by utilising not one but a combination of causal factors such as performance expectancy, effort expectancy and facilitating conditions. Wide societal deployment of wearables depends on performance and expectations.

The widespread use of mobile devices depends on performance expectancy and effort expectancy. To transit to a real knowledge economy, co-creation should occur at early stages of product development so that these expectations are shared and better products be developed.

This paper offers a nuanced understanding of fitness wearable adoption by analysing adopters and non-adopters through variable- and case-oriented techniques. It complements the one-linear-path perspective with a number of alternative causal combinations of variables that lead to use and intention to use fitness wearables. While the causal path for adopters is unique, there are a number of causal combinations of antecedents that lead to high intention to use in potential adopters.

The aim of this paper is to test how leader–member exchange (LMX) interacts with procedural justice climate to influence three types of employee motivation (i.e. achievement striving motivation, status striving motivation and communion striving motivation). Furthermore, this study empirically examines the indirect effects of LMX on customer loyalty through employee motivation and service orientation.

This study used a matched sample of 188 retail service employees and 376 customers from a large shopping mall in South Korea to test the empirical model. Structural equation modeling (SEM) and bootstrapping method were employed to test a series of proposed hypotheses.

The results show that LMX significantly enhances customer loyalty through two motivational dimensions and service orientation. In particular, this study shows that achievement and status striving motivation are directly related to service orientation, but communion striving motivation does not affect customer-focused service attitude. In addition, procedural justice climate serves as a critical moderator and synergistically interacts with LMX to influence achievement and status striving motivation.

This study offers new insight regarding how managers' roles in both individual (leader–member exchange) and organizational (procedural justice climate) level affect different forms of retail service employee motivation and service orientation, which in turn, result in customer loyalty.

The results suggest that when retail service employees perceive procedural fairness at retail stores, they are more motivated to work hard to complete their assignments and achieve their sales goals in conjunction with leader support. Therefore, managers must provide a clear guideline and procedure regarding salary raises and performance evaluations or engage in thorough discourse on such matters with employees prior to announcements of such decisions. Moreover, as retail service employees interact with customers in the frontline, and how they serve customers plays a key role in creating customer loyalty. Managers should encourage retail service employees to engage in service-oriented behaviors.

The results suggest that LMX facilitates more formal task-related motivation to achieve either tasks or status while it is less related to relationship-building motivation, which is a unique contribution of this study. The results offer better understating of how LMX differentially leads to specific types of employee motivation in the existing literature.

To follow and maintain an appropriate distance to the selected target person (STP), the mobile robot is required to have capabilities: the human detection and tracking and an efficient following strategy with a smooth manner that does not appear threatening to the STP and surroundings. The efficient following strategy must integrate the STP position and the obstacle information to achieve smooth and safe human-following behaviors, especially in unknown environments where robot does not have understandings in advance. The purpose of this study is to propose a robust-adaptive-behavior strategy for mobile robots.

This paper presents a robust-adaptive-behavior strategy (RABS) based on the fuzzy inference mechanism to help the robot follow the STP effectively in various unknown environments with the real-time obstacle avoidance, both indoor and outdoor and on different robot platforms. In which, the traversability of robots’ unknown surrounding environments is analyzed by using the STP position and the obstacle information obtained from the two dimensional laser scan, whose purpose is to choose the highest-traversability-score direction (HTSD) and an adaptive-safe-following distance (ASFD). Then, the HTSD, the ASFD and the current velocity of the robot are considered as inputs of the fuzzy system to adjust its velocity smoothly.

The proposed RABS is verified by a set of experiments using a real big-heavy autonomous mobile robot (BH-AMR), with the dimension 0.8 × 1.2 (m), weight 150 (kg), full-load 500 (kg), aiding smart factories. The obtained results have shown that the proposed RABS equips the BH-AMR with the ability to follow the STP smoothly and safely even when the robot is moving at the maximum speed 1.5 (m/s).

In this paper, the autonomous mobile robot considers all environments as unknown even when it is working in mapped environments. This limitation is presented clearly in the future works section.

This proposed method can be used to help the autonomous mobile robot support persons in factories, hospitals, restaurants, supermarkets or at the airports.

This paper presents a RABS, including three new features: a fuzzy-based solution to help human-following robots maintain an appropriate distance to the STP safely and smoothly with the maximum velocity 1.5 (m/s); the proposed fuzzy-based solution, an adaptive vector field histogram and a new approach for the STP tracking is combined to follow the STP and avoid the collision simultaneously in unknown indoor and outdoor environments; the proposed RABS is considered for BH-AMRs (with the dimension 0.8 × 1.2 (m), weight 150 (kg), full-load 500 (kg)) to serve real tasks in smart factories.

This study aims to identify key motivation factors for consumers’ social search and examine the role of flow in the process. This study assessed how content quality (i.e. visual aesthetics, textual information and timeliness) and system quality (i.e., intuitiveness and interactivity) influence flow experience. Additionally, this study tested how mental simulation and ease of task mediate this process and examined how the flow experience leads to purchase intention.

An online survey via Amazon MTurk was performed using the general consumer population in the USA. Structural equation modeling (SEM) was conducted to test proposed hypotheses.

Visual aesthetics, text information, intuitiveness and interactivity were found to increase consumers’ flow experience in social search on Instagram. The timeliness of information was not a significant predictor of flow experience. Additional analyses demonstrated the mediating role of mental simulation and perceived ease of task mediate in flow experience, ultimately leading to increased purchase intention.

The concept of flow should be taken into consideration in a setting of social media marketing. To create holistic consumption experiences, social media strategy should promote seamless information search by increasing both the content (i.e. visual aesthetics and text information) and system (i.e. intuitiveness and interactivity) quality.

This study expands the theory of flow by applying it to the social search process in social media. Mental simulation and perceived ease of task are distinctively recognized as essential factors for flow experience on Instagram.

The purpose of this paper is to test the effects of the service orientation on bank-employee behaviors; to empirically examine the moderating role of the productivity orientation in an effort to explain when and why the simultaneous pursuit of the service orientation and the productivity orientation negatively affect the financial service employee psychological empowerment; and to explore any contextual factors that can suppress or facilitate the bank–employee behaviors.

A single cross-sectional descriptive design was used for this study. Purposive sampling was used to identify the respondents who were bank employees in financial-service-sector organizations in South Korea. To analyze the data, a confirmatory-factor analysis (CFA) using LISREL 8.5 was employed. Conditional process modeling was performed to test the moderated mediation and the moderated-mediation hypotheses.

The results showed a significant relationship between the service orientation and the frontline-employee behaviors, thereby establishing the psychological empowerment as an intervening mechanism. The findings also suggest that the moderating role of the productivity orientation weakened the positive effect of the service orientation on the bank-employee psychological empowerment. This research identifies the positive interactive effect of the customer power upon the psychological empowerment of the employee extra-role behavior. The task interdependence enhanced the link between the psychological empowerment and the employee in-role behavior.

The specific service sector that was chosen is retail banking. The cross-sectional nature of the data is considered a limitation; furthermore, the self-reported nature of the completed questionnaires might have resulted in the common method bias. Further research should be conducted to collect longitudinal data from other service sectors to verify the hypothesized relationship. Extensions into other sectors that differ in terms of the customer power degree and the task interdependence level could lead to a contingency framework that shows if and how the hypothesized linkages can be changed according to the contextual factors.

For managers who want or need to pursue the strategic goals of the service orientation and the productivity orientation simultaneously, this study offers useful insights into the management of the strategic dilemmas that stem from service-setting multi-goal pursuits from an employee perspective. Second, the significant positive relationships that were observed between the values of the overt customer power and the extra-role behavior suggest that constraining and influential customer behaviors are likely to produce a structured working environment that encourages the bank-employee extra-role behavior. Third, the results also suggest that the task structure (task interdependence) may influence the employee in-role behavior. Thus, managers should encourage an organizational sense of belonging for their employees and an understanding of the essential nature of the employee work role in terms of a competitive organizational performance.

In banking circumstances, stickiness on product orientation by cutting cost will deteriorate the level of customer service and will then reduce customer revenues. In this case, disgruntled staff and unhappy customers perceive that their interests are being sacrificed in the pursuit of greater productivity. In this situation, revenues may fall faster than the reduction in costs. Thus, it may be proven that the cost of the dual demands from these two orientation types outweigh the benefit. Bank executives may perceive organizational productivity orientation as being an easier and more evident tool to use for reducing cost, especially with the existence of tough competition. Critically, in addition to poor service quality, this study indicates that there is a side effect of productivity orientation practice. Thus, managers should use caution in the concurrent employment of the two types.

This study identified the reason for the negative service outcomes that result from the simultaneous pursuits of the service orientation and the productivity orientation. From an employee perspective, it might be proven that the costs of the dual-service and production-orientation demands may outweigh the benefits. Thus, this proposed research model, in which the frontline autonomy acted as a key mediator and the customer power and the task interdependence were salient moderators, has been shown as crucial in the transmission of the impacts of the service and the quality orientation, and in the blunting of the service-productivity trade-offs that are due to the employee’s perceived multi-goal orientations.

Despite the many advantages this type of equipment offers, there are still some major drawbacks. Linear cutting machine (LCM) cannot accurately simulate the true rock-cutting process as 1. it does not account for the circular path along which tunnel boring machine (TBM) disk cutters cut the tunnel face, 2. it does not accurately model the position of a disk cutter on the cutterhead, 3. it cannot perfectly replicate the rotational speed of a TBM. To enhance the knowledge of these issues and in order to mimic the real rock-cutting process, a new lab testing equipment was developed by Hyundai Engineering and Construction.

A new testing machine called rotary cutting machine (RCM) is designed to simulate the excavation process of hard-rock TBMs and includes features such as TBM cutterhead, RPM simulation, constant normal force mode and constant penetration rate mode. Two sets of tests were conducted on Hwandeung granite using different disk cutter sizes to analyze the cutting forces in various excavation modes. The results are analyzed using statistical analysis and dimensional analysis. A new model is generated using dimensional analysis, and its results are compared against the results of actual cases.

The effectiveness of the new RCM test was demonstrated in its ability to apply various modes of excavation. Initial analysis of chip size revealed that the thickness of the chips is largely dependent on the cutter spacing. Tests with varying RPM showed that an increase in RPM results in an increase in the normal force and rolling force. The cutting coefficient (CC) demonstrated a linear correlation with penetration. The optimal specific energy is achieved at an S/p ratio of around 15. However, a slightly lower S/p ratio can also be used in the design if the cutter specifications permit. A dimensional analysis was utilized to develop a new RCM model based on the results from approximately 1200 tests. The model's applicability was demonstrated through a comparison of TBM penetration data from 26 tunnel projects globally. Results indicated that the predicted penetration rates by the RCM test model were in good agreement with actual rates for the majority of cases. However, further investigation is necessary for softer rock types, which will be conducted in the future using concrete blocks.

The originality of the research lies in the development of Hyundai Engineering and Construction’s advanced full-scale laboratory rotary cutting machine (RCM), which accurately replicates the excavation process of hard-rock tunnel boring machines (TBMs). The study provides valuable insights into cutting forces, chip size, specific energy, RPM and excavation modes, enhancing understanding and decision-making in hard-rock excavation processes. The research also presents a new RCM model validated against TBM penetration data, demonstrating its practical applicability and predictive accuracy.

This study investigated the influence of ambiguous customer expectations and customer demandingness, which reflect hindrance and challenge demands, on the boundary spanning behaviors (BSBs) of frontline bank employees (FBEs) through person-job fit and work engagement. It also examined the moderating effect of customer stewardship between job demands and work engagement.

Data of 296 FBEs in the retail banking industry in the Republic of Korea were collected through an online survey and analyzed.

Ambiguous customer expectations acted as hindrance demands and negatively affected FBEs' psychological process. Additionally, customer demandingness positively affected FBEs' psychological process as challenge demands. Moreover, person-job fit and work engagement improved the BSBs of FBEs as a psychological motivation process. Lastly, customer stewardship buffered the negative influence of ambiguous customer expectations on work engagement while strengthening the positive influence of customer demandingness on work engagement.

This study contributes to the marketing literature by presenting customer-related characteristics influencing the BSBs of FBEs and exploring the psychological response processes. First, this study presents empirical evidence that ambiguous customer expectations and customer demandingness play the role of hindrance and challenge demands, respectively. Second, it confirms that customer-related characteristics affect the BSBs of FBEs through psychological processes. Finally, it enriches the authors' understanding of customer stewardship as a job resource by exploring the role of customer stewardship in moderating the relationship between different types of job demands and work engagement.