A mixed method approach to developing a multidimensional scale for gambling fallacy in the Korean context

This article offers an understanding of and reduces gaps in the existing literature regarding cognitive distortion (e.g. gambling fallacy) and problem gambling behaviour. The primary objective of this study is to develop a valid gambling fallacy scale for the South Korean population using qualitative and quantitative methods to thoroughly understand the underlying structure of erroneous beliefs towards gambling among recreational and problem gamblers. The study interviewed eight casino supervisors and dealers and conducted online (n = 1419 gamblers) and onsite surveys (n = 400 gamblers) in South Korea. The proposed scale satisfies reliability and numerous types of validity that provide evidence on the three distinctive underlying structures of gambling fallacy (i.e. a system to win, superstitions, and follow and blame) among the Korean population. This study carries substantial theoretical and practical implications that further assure its usability as a platform for developing scales in various cultural settings.     

Rearticulating Black Mixed-Race in the Era of Globalization

Since the mid-2000s, the term multiculturalism has entered the Korean lexicon as migration has become more and more prevalent due to globalization. The cornerstone of this multicultural explosion was a 2006 visit by American football star Hines Ward, born to an African-American father and a Korean mother. As a black mixed-race sports celebrity, he suddenly became an emblematic media figure in the Korean televisual landscape, signifying a broader racial reconfiguration in Korean society. This media event – what I shall call ‘the Hines Ward moment’ – created and opened the discursive space for racial politics and multicultural issues in Korean society. Hence, this article aims to look at what this discursive explosion of multiculturalism and mixed-race means in the context of globalization. Reading the Hines Ward moment as a symbolic media text, the paper examines how the media discourse on Hines Ward articulates the issues of national identity and racial politics in contemporary Korean society. For analysis, newspaper articles, television programmes and television commercials that deal with the Hines Ward case are examined. By analyzing the modes of articulation of the Hines Ward moment, this study deconstructs the image of a ‘global, multicultural Korea’ shaped by the Korean media and examines the struggle for Koreanness in the televisual area of contemporary Korean media.     

Combinatorial Voting

We study elections that simultaneously decide multiple issues, where voters have independent private values over bundles of issues. The innovation is in considering nonseparable preferences, where issues may be complements or substitutes. Voters face a political exposure problem: the optimal vote for a particular issue will depend on the resolution of the other issues. Moreover, the probabilities that the other issues will pass should be conditioned on being pivotal. We prove that equilibrium exists when distributions over values have full support or when issues are complements. We then study large elections with two issues. There exists a nonempty open set of distributions where the probability of either issue passing fails to converge to either 1 or 0 for all limit equilibria. Thus, the outcomes of large elections are not generically predictable with independent private values, despite the fact that there is no aggregate uncertainty regarding fundamentals. While the Condorcet winner is not necessarily the outcome of a multi‐issue election, we provide sufficient conditions that guarantee the implementation of the Condorcet winner.     

Investing in a Shared Supplier in a Competitive Market: Stochastic Capacity Case

When firms invest in a shared supplier, one key concern is whether the invested capacity will be used for a competitor. In practice, this concern is addressed by restricting the use of the capacity. We consider what happens when two competing firms invest in a shared supplier. We consider two scenarios that differ in how capacity is used: exclusive capacity and first‐priority capacity. We model firms' investment and production decisions, and analyze the equilibrium outcomes in terms of the number of investing firms and capacity levels for each scenario; realized capacity is a stochastic function of investment levels. We also identify conditions under which the spillover effect occurs, where one firm taps into the other firm's invested capacity. Although the spillover supposedly intensifies competition, it actually discourages firms' investment. We also characterize the firms' and supplier's preference about the capacity type. While the non‐investing firm always prefers spillovers from the first‐priority capacity, the investing firm does not always want to shut off the other firm's access to its leftover capacity, especially when allowing spillover induces the other firm not to invest. The supplier's preference depends on the trade‐off between over‐investment and flexibility.     

Young Adults’ Life Outcomes and Well-Being: Perceived Financial Socialization from Parents,the Romantic Partner,and Young Adults’ Own Financial Behaviors

We examined how perceived financial socialization—from parents, the romantic partner, and young adults’ own behavior—was associated with young adults’ life outcomes and well-being (i.e., physical and mental health, finances, romantic relationship). Using data (N?=?504) from young adults specific to their finances, results from hierarchical regression analyses showed that young adults’ own financial behaviors were the most patterned, followed by financial socialization from the romantic partner, and then from financial socialization from parents (only objective financial knowledge). We discuss how young adults’ financial behavior, financial socialization from the romantic partner and, to a lesser extent, parental socialization are associated with young adults’ life domains, underscoring the developmental salience of increased financial capability and relationship formation and decreased dependence on parents during the transition to adulthood.     

Using ranked set sampling with binary outcomes in cluster randomized designs

We study the use of ranked set sampling (RSS) with binary outcomes in cluster-randomized designs (CRDs), where a generalized linear mixed model (GLMM) is used to model the hierarchical data structure involved. Under the GLMM-based framework, we propose three different approaches to estimate the treatment effect, including the nonparametric (NP), maximum likelihood (ML) and pseudo likelihood (PL) estimators. We investigate their asymptotic properties and examine their finite-sample performance via simulation. Based on these three RSS estimators, we further develop procedures for testing the existence of the treatment effect. We examine the power and size of our proposed RSS tests and compare them with existing tests based on simple random sampling (SRS). All the proposed RSS estimation and test methods are illustrated with two data examples, one for rare events and the other for non-extreme events. Throughout our investigations, we also consider the possible effect of imperfect ranking. Among the proposed methods, we provide recommendations on whether to use RSS rather than SRS with binary outcomes in CRDs and, if yes, when to use which RSS method. The Canadian Journal of Statistics 48: 342–365; 2020 © 2019 Statistical Society of Canada     

The added value of virtual reality technology and force feedback for surgical training simulators

Laparoscopic surgery requires more specialized training of the surgeons than traditional open surgery. The Virtual Basic Laparoscopic Surgical Trainer (VBLaST) is being developed as a virtual version of the Fundamentals of Laparoscopic Skills (FLS) trainer. This study assessed the current haptic and virtual reality (VR) technology of a virtual peg transfer task of the VBLaST, based on the subjective preference of surgeons and their objective task performance measures. Twenty-one surgical residents, fellows and attendings performed a peg-transfer task in the FLS and the VBLaST. Each subject performed 10 trials on each simulator. Results showed that subjects performed significantly better on the FLS than on the VBLaST. Subjects showed a significant learning effect on both simulators, but with an accelerated improvement on the VBLaST. Even so, 81% of the subjects preferred the FLS over the VBLaST for surgical training which could be attributed to the novelty of the VR technology and existing deficiencies of the haptic interface. Despite the subjective preference for the physical simulator, the performance results indicate an added value of VR and haptics in surgical training, which is expected to be demonstrated in more surgically relevant tasks such as suturing and knot-tying.     

Logrank test for bivariate survival data

The logrank test procedure for testing bivariate symmetry against asymmetry in matched-pair data is proposed. The presented test statistic is based on Mantel-Haenszel type statistics evaluated at diagonal grid points on the plane obtained from distinct uncensored failure times. The asymptotic results of the proposed test are derived and an example is shown to illustrate the methodology.     

Responding to child maltreatment: Comparison between the USA and China

A recent study estimated that over one‐fourth of Chinese children have suffered maltreatment (Fang et al., 2015 ). However, the current child welfare policy in China is limited to orphans, abandoned children, and children with disabilities. Also, there is very little comparative research in China on Chinese and other countries’ child welfare systems. The purpose of this study was to analyze applicable US and Chinese child welfare policies, identify gaps in Chinese policy regarding child maltreatment, and make recommendations for a policy agenda for improving child welfare in China based on cultural values and existing policy structures. Results show that China has considerable capacity to make improvements in child protective services, foster care, and adoption policies. Based on the results of this study, several implications are provided to develop China's child maltreatment policy to increase children's outcomes of well‐being, safety, and permanency. Key Practitioner Message: ? To understand the background and system of current Chinese child maltreatment policy; ? To review US child maltreatment policy and its implementation to identify gaps in the Chinese child maltreatment system; ? To provide policy suggestions to develop Chinese child maltreatment policy and provide recommendations for social work education and practice in China.