The effects of negative mentoring experiences on mentor creativity: The roles of mentor ego depletion and traditionality

The literature often focuses on the positive effects of mentoring, especially for protégés. When mentoring experiences are negative, the assumption is that these negative effects are less detrimental to the mentor than to the protégé, owing to the mentor's greater relative power in the relationship. This study uses ego depletion theory to examine the link between negative mentoring experiences (as rated by protégés) and mentor creativity and focuses on the mediating and moderating roles of mentor ego depletion and mentor traditionality on this link. The results are based on data from 227 protégés, 187 mentors, and 187 supervisors of mentors in Chinese organizations. The findings support a mediating effect of ego depletion on the negative relationship between negative mentoring experiences and mentor creativity. In addition, the study finds that traditionality attenuates both the positive relationship between negative mentoring experiences and ego depletion and the indirect effect of negative mentoring experiences on mentors' creativity through ego depletion. The implications for management theory and practice are discussed.     

Risk sharing and export performance with firm heterogeneity

We investigate how market uncertainty affects the export performance of a firm through financial frictions. We first extend Melitz's (2003) heterogeneous firm trade model by incorporating demand shocks, linking the demand uncertainties to the financing costs of firms. In this extension, the default probability is endogenously determined by a firm's productivity and demand uncertainty. Hence, firms with higher productivity or lower market uncertainty are offered lower interest rates and thus show better export performance. As an application, we also show that a risk-sharing mechanism, that pools default risk for a certain group of firms, lowers the default risk. This mechanism allows banks to charge lower interest rates to the member firms and therefore ultimately improves their export performance in both extensive and intensive margins. We find a real-world example of such a mechanism from business groups in Korea. Using Korean firm-level data, we show that the more diversified the business group, the greater the likelihood that its member firms export and the bigger their export revenues. We also show that our results are robust to alternative explanations for Korean business groups’ export competitiveness.     

A name classification method using the I Ching name configurations for Taiwan local elections

Quality & Quantity - The purpose of this study is to apply the methodology of the I Ching divination to examine whether names of government leaders and parliamentary representatives exist in...     

Understanding fashion communication between Korean middle‐aged mothers and daughters

Daughters can be considered important social role models for middle‐aged mothers in fashion communication such as the clothing purchase or conformity. This study explores antecedents (trust in daughters as fashion informants and internalized social pressure for appearance management) and outcomes (solidarity between mother and daughter, psychological well‐being of mother) of fashion communication (mother–daughter shopping, clothing conformity) between middle‐aged mothers and daughters. The data were collected using a self‐administered online survey of 307 middle‐aged Korean women between ages of 45 and 65. The result shows that mothers’ trust in daughters as fashion informants and internalized social pressure for appearance positively influence mother–daughter shopping and mothers’ clothing conformity to daughters. Next, mother–daughter shopping and mothers’ clothing conformity have a positive influence on the solidarity of mothers and daughters. When solidarity becomes stronger, the degree of the mothers’ psychological well‐being increases.     

Effects of financial education on sound personal finance in Korea: Conceptualization of mediation effects of financial literacy across income classes

This study analyzed the role of financial literacy as a mediator between financial education and sound personal finance to assess how financial education affects the soundness of personal finance. In particular, this study conducted three sets of mediation analyses using data from the 2014 Consumer Empowerment Index survey of the Korea Consumer Agency to verify whether the mediating relationship is valid across different income classes of the Korean population. The results suggest that financial literacy works as a mediator between financial education and sound personal finance in the high‐income class and the middle‐income classes. Therefore, policymakers should consider the limitations of financial education and financial literacy when addressing low‐income consumers.     

BitMEX bitcoin derivatives: Price discovery,informational efficiency,and hedging effectiveness

BitMEX is the largest unregulated bitcoin derivatives exchange, listing contracts suitable for leverage trading and hedging. Using minute-by-minute data, we examine its price discovery and hedging effectiveness. We find that BitMEX derivatives lead prices on major bitcoin spot exchanges. Bid–ask spreads, interexchange spreads, and relative trading volumes are important determinants of price discovery. Further analysis shows that BitMEX derivatives have positive net spillover effects, are informationally more efficient than bitcoin spot prices, and serve as effective hedges against spot price volatility. Our evidence suggests that regulators prioritize the investigation of the legitimacy of BitMEX and its contracts.     

Stable Discovery of Interpretable Subgroups via Calibration in Causal Studies

Building on Yu and Kumbier's predictability, computability and stability (PCS) framework and for randomised experiments, we introduce a novel methodology for Stable Discovery of Interpretable Subgroups via Calibration (StaDISC), with large heterogeneous treatment effects. StaDISC was developed during our re-analysis of the 1999–2000 VIGOR study, an 8076-patient randomised controlled trial that compared the risk of adverse events from a then newly approved drug, rofecoxib (Vioxx), with that from an older drug naproxen. Vioxx was found to, on average and in comparison with naproxen, reduce the risk of gastrointestinal events but increase the risk of thrombotic cardiovascular events. Applying StaDISC, we fit 18 popular conditional average treatment effect (CATE) estimators for both outcomes and use calibration to demonstrate their poor global performance. However, they are locally well-calibrated and stable, enabling the identification of patient groups with larger than (estimated) average treatment effects. In fact, StaDISC discovers three clinically interpretable subgroups each for the gastrointestinal outcome (totalling 29.4% of the study size) and the thrombotic cardiovascular outcome (totalling 11.0%). Complementary analyses of the found subgroups using the 2001–2004 APPROVe study, a separate independently conducted randomised controlled trial with 2587 patients, provide further supporting evidence for the promise of StaDISC.     

The impact of competition on vertical integration: The role of technological niche width

Despite there being numerous studies exploring the relationship between competition and vertical integration, the empirical findings regarding the nature of this relationship are still unclear. The current study suggests that technological niche width mediates the relationship between competition and vertical integration. It also suggests that technological niche width and vertical integration play a complementary role in enhancing firm performance. These arguments have found empirical support in the examination of the U.S. hybrid electric vehicle market from 2008 to 2016. In so doing, this study provides an opportunity to better understand the relationship between competition, vertical integration, and technological niche width. In addition, it explains how firms can effectively manage fierce competition and achieve the goal of superior performance through strategic decisions regarding vertical integration and technological niche width.     

Examining the heterogeneity of treatment patterns in attention deficit hyperactivity disorder among children and adolescents in the Texas Medicaid population: modeling suboptimal treatment response

Objectives: To examine suboptimal responses (SR) in attention deficit hyperactivity disorder (ADHD) among pediatric patients in the Texas Medicaid program receiving osmotic-release oral system methylphenidate (OROS-MPH) or lisdexamfetamine (LDX) and apply an SR prediction model to identify patients most likely to experience an SR to either OROS-MPH or LDX therapies.

Methods: A retrospective cohort study was conducted using Texas Medicaid claims data of ADHD children and adolescents (6–17?years of age) initiating OROS-MPH or LDX. Primary SR endpoints were drug discontinuation, switching, and augmentation 12-months post-ADHD drug initiation. Logistic regression models were developed to predict SR to OROS-MPH and LDX in 1:1 matched groups of children and adolescent cohorts.

Results: A total of 3,633 children and 1,611 adolescents were matched for each cohort. SR was observed among more children (76.4% vs 72.3%; p?p?=?0.002) initiating OROS-MPH compared to LDX. Patient sub-groups with the highest predicted risk of OROS-MPH SR experienced significantly lower observed SR rates (p?Conclusions: This study demonstrated how a personalized medicine approach using administrative claims data can be used to identify sub-groups of child and adolescent ADHD patients with different risks for suboptimal response with OROS-MPH or LDX in a Medicaid population.     

Locally Sourced Restaurant: Consumers Willingness to Pay

This study tested (1) the theory of planned behavior to identify factors influencing customers’ willingness to pay more when visiting a locally sourced restaurant, and (2) assesses the effect of health consciousness and community attachment on willingness to pay more through attitude, subjective norms, and perceived behavioral control in visiting a locally sourced restaurant. A total of 423 responses were analyzed using a two-step approach of structural equation modeling. The findings indicated that health consciousness and community attachment positively influences attitude, subjective norm, and perceived behavioral control in visiting a locally sourced restaurant, which ultimately influence willingness to pay more.