Informal Mentoring at Work: A Review and Suggestions for Future Research

This paper reviews the literature on informal mentoring at work. Based on two basic premises of interpersonal relationships, it discusses four promising areas in current mentoring research that could be cultivated further by future research. The first premise that we hold is that relationships never exist in a vacuum. Traditionally, however, mentoring literature has often overlooked the context of mentoring. We propose that the developmental network approach can be further extended to gather more insight into the interplay between mentoring dyads and their context. Also, mentoring literature could pay more attention to temporal influences in mentoring studies. The second premise that is applied is that relationships are not only instrumental in nature. However, mentoring research to date has mostly applied a one‐sided and transactional view to mentoring. Relational mentoring theory could be helpful in examining relational motivations of both members. Also, mentoring literature can achieve more explanatory power by examining the underlying mechanisms of mentoring, next to social exchange principles, that cause these developmental changes. In summary, in each of these four research areas, we identify and discuss fundamental questions and developments in research that can advance mentoring theory and practice.     

Gender Differences in Happiness and Life Satisfaction Among Adolescents in Hong Kong: Relationships and Self-Concept

This study uses survey data from adolescents (N = 1,428) in Hong Kong to test the association of gender with happiness and life satisfaction through relationship style and self-concept. While self-esteem and purpose in life are associated with higher happiness and life satisfaction, having more close friends is related to higher happiness, but not necessarily life satisfaction. On the other hand, boys with higher academic achievement are happier, but not more satisfied; the opposite holds true for girls. Our results provide a much-needed investigation of the differential effect of gender on the subjective well-being of adolescents. Contributing to the theoretical debate about the concepts of subjective well-being, we argue that happiness and life satisfaction are empirically and conceptually distinct. Life satisfaction might be characterized by more profound enjoyment and achievement in life than happiness.     

Linking macro‐level mechanisms to street‐level accountability practices. A cross‐national case study of street‐level accountability of social workers in government funded homeless shelters

Available studies on the accountability relation between social work and the government are mainly conducted in Anglo‐Saxion countries. This limits the generalizability of these findings to other countries. Moreover, these studies hardly descent to the street‐level, making the perceptions and actions of social workers barely visible. To address this gap, this article explores how three elements of governance interact with street‐level accountability of social workers in homeless care in three country cases (the Netherlands, Belgium and Germany). The data (N26) was gathered by means of a mixed method design (interviews, focus groups and document analysis). By combining a street‐level bureaucracy research approach with a relational definition of accountability, we opened up the black box of what happens in these organizations and bridged the gap between macro‐level mechanisms and street‐level accountability. Our study adds three important insights to street‐level research of accountability in social work. First, elements of governance cannot be studied in isolation. Mechanisms should always be explained in relation to the context in which they are embedded. Second, the social workers in our cases do not perceive their accountability to the government as a professional obligation. They see it as a strategic mechanism to secure funding. Third, interaction is an important condition for the engagement of the social workers in their accountability relation with the government. More research is needed to develop a multi‐level theory that identifies which mechanisms play a role in the accountability relation between the government and social workers.     

COVID-19 vaccine rollout—scale and speed carry different implications for corruption

The sanctioning of different coronavirus vaccines (with some approved by regulators for public delivery, and others in the pipeline) has met with relief by many sections of the public and the government. However, partly due to the damages associated with the pandemic and the ensuing euphoria over vaccines’ arrival, some of the challenges are mostly being ignored or are not recognized. This paper identifies some pitfalls and drawbacks in vaccine delivery. We argue that the somewhat unique tension between the speed of vaccine delivery and its scale can create opportunities for corrupt behavior that are often at odds with effective means to check abuse. While data on instances of abuse will emerge over time, it is useful to point out different avenues of abuse so that some preventive government actions can be undertaken. Specifically, we argue that the potential for out of turn delivery of vaccines and the stockpiling by unauthorized agents creates incentives for corruption, with the public or bureaucrats initiating corrupt transactions. An understanding of the potential avenues for corruption should guide the formulation of appropriate corruption-control policies and similar challenges that will be faced by policy makers in addressing future pandemics.     

Economic distress and health: A fixed effects analysis of low‐income persons in Singapore

Using fixed effects regressions, this study examined the transactional effects of different types of economic status on the physical and mental health of low‐income persons in Singapore. Among the economic variables considered, unemployment and arrears had the most significant effects. This signals the physical and psychological distress of being out of work and possessing arrears while income is low. The insignificant effects of poor health on household earnings suggest possible earnings supplementation by other household members. The findings imply the fruitfulness of dually improving employment prospects and health, work activation that takes into consideration mental health effects, increasing affordability of health services in liberal welfare systems, improving mental bandwidth through reducing arrears accounts, and short lag time from application to receipt of assistance. These implications point to a larger question on health and welfare systems in an increasingly uncertain economic environment for households in poverty. Key Practitioner Message: ? Employment and health are inter‐related: employment assistance incorporating physical and mental health interventions and vice versa can be more effective than either alone; ? Compared with decreasing arrears amounts, reducing the number of arrears can more effectively relieve mental distress; ? Effects between economic distress and health materialise quickly; minimising the lag time between application and receipt of assistance will provide great relief.     

A Cautionary Note on the Analysis of Extreme Data with Cox Regression

This article analyzes a small censored data set to demonstrate the potential dangers of using statistical computing packages without understanding the details of statistical methods. The data, consisting of censored response times with heavy ties in one time point, were analyzed with a Cox regression model utilizing SAS PHREG and BMDP2L procedures. The p values, reported from both SAS PHREG and BMDP2L procedures, for testing the equality of two treatments vary considerably. This article illustrates that (1) the Breslow likelihood used in both BMDP2L and SAS PHREG procedures is too conservative and can have a critical effect on an extreme data set, (2) Wald's test in the SAS PHREG procedure may yield absurd results from most likelihood models, and (3) BMDP2L needs to include more than just the Breslow likelihood in future development.     

Combining the complete-data and nonresponse models for drawing imputations under MAR

In multiple imputation (MI), the resulting estimates are consistent if the imputation model is correct. To specify the imputation model, it is recommended to combine two sets of variables: those that are related to the incomplete variable and those that are related to the missingness mechanism. Several possibilities exist, but it is not clear how they perform in practice. The method that simply groups all variables together into the imputation model and four other methods that are based on the propensity scores are presented. Two of them are new and have not been used in the context of MI. The performance of the methods is investigated by a simulation study under different missing at random mechanisms for different types of variables. We conclude that all methods, except for one method based on the propensity scores, perform well. It turns out that as long as the relevant variables are taken into the imputation model, the form of the imputation model has only a minor effect in the quality of the imputations.     

Asymptotic variance–covariance matrix of sample autocorrelations for threshold-asymmetric GARCH processes

In the field of financial time series, threshold-asymmetric conditional variance models can be used to explain asymmetric volatilities [C.W. Li and W.K. Li, On a double-threshold autoregressive heteroscedastic time series model, J. Appl. Econometrics 11 (1996), pp. 253–274]. In this paper, we consider a broad class of threshold-asymmetric GARCH processes (TAGARCH, hereafter) including standard ARCH and GARCH models as special cases. Since sample autocorrelation function provides a useful information to identify an appropriate time-series model for the data, we derive asymptotic distributions of sample autocorrelations both for original process and for squared process. It is verified that standard errors of sample autocorrelations for TAGARCH models are significantly different from unity for lower lags and they are exponentially converging to unity for higher lags. Furthermore they are shown to be asymptotically dependent while being independent of standard GARCH models. These results will be interesting in the light of the fact that TAGARCH processes are serially uncorrelated. A simulation study is reported to illustrate our results.     

A multi-faced buildup algorithm for three-dimensional packing problems

This paper provides a new approach to solving the three-dimensional packing problem. The heuristic developed uses a multi-faced buildup technique in the packing procedure for which there is no requirement for packed boxes to form flat layers. The basic algorithm is then augmented by a Look-ahead strategy. Experimental results indicate an average packing utilization of 87.8% which improve current benchmarks significantly. The new approaches given here add to heuristics currently available.     

A heuristic approach for component scheduling on a high-speed PCB assembly machine

The collect-and-place machine is one of the most widely used placement machines for assembling electronic components on the printed circuit boards (PCBs). Nevertheless, the number of researches concerning the optimisation of the machine performance is very few. This motivates us to study the component scheduling problem for this type of machine with the objective of minimising the total assembly time. The component scheduling problem is an integration of the component sequencing problem, that is, the sequencing of component placements; and the feeder arrangement problem, that is, the assignment of component types to feeders. To solve the component scheduling problem efficiently, a hybrid genetic algorithm is developed in this paper. A numerical example is used to compare the performance of the algorithm with different component grouping approaches and different population sizes.