Suchergebnisse

We examined the effect on customer loyalty of the type of loyalty program (paid vs. free) and timing of rewards (immediate vs. delayed). To test the research objectives we recruited 142 Korean college students and used a 2 × 2 full-factorial, randomized experimental design. Results
suggested that the membership fee in paid loyalty programs acted as a sunk cost, which, compared to free loyalty programs, led to greater loyalty to the provider. An immediate (vs. delayed) reward was generally preferred; however, owing to the sunk cost effect, this depended to some extent
on the type of loyalty program. In a paid loyalty program, immediate rewards were effective in increasing customer loyalty, whereas customers in free loyalty programs focused more on receiving the reward regardless of its timing. Our findings contribute to the literature by providing useful
information for the design of an effective loyalty program scheme.

AbstractBenzyl benzoate (BB) is widely used in the food, cosmetics, agriculture, and pharmaceutical industries and is discharged into the aquatic environment via various water sources, including wastewater. Research on the bioaccumulation and possible toxicity of BB has been conducted, but the biochemical responses to BB toxicity are not fully understood, and the specific molecular pathways by which BB causes toxicity remain unknown. In this study, label-free quantitative proteomics based on mass spectrometry was applied to investigate protein profiles in zebrafish (Danio rerio) embryos exposed to BB (1 µg/mL) for 7 days. A total of 83 differentially expressed proteins (DEPs) were identified, including 49 up-regulated and 34 down-regulated proteins. The biological functions of proteins regulated by BB were grouped into functional categories and subcategories, including the biosynthesis of organonitrogen compound biosynthetic process, translation, amide biosynthetic process, lipid transport, stress response, and cytoskeletal activity. The results provide novel insight into the molecular basis of the ecotoxicity of BB in aquatic ecosystems.

Background: Few controlled studies have examined social class as a risk factor for suicide in Korea.Aim: The objective of the present study was to investigate the effects of social class on suicide risk in Korea.Methods: A case-control design was constructed from cause-of-death statistics for the period 1999 to 2001, in Korea, as published by the Korean National Statistical Office. The cases were defined as people aged between 20 and 64 who died by suicide, while the controls were defined as those who died of natural causes in the same age groups.Results and conclusions: The proportions and odds ratios for suicide were higher in young people than in elderly people, and higher for divorced subjects than for cohabitants. They were also higher for residents of rural areas, as opposed to residents of Seoul and other metropolitan areas, and for people in social classes III and IV, than they were for those in social class I. To control the variables that influence risk of suicide, such as age, marital status and area of residence, we used multiple logistic regression. Compared with class I, risk of suicide was higher in social classes III and IV, in both sexes. The principal conclusion of this study is that, regardless of sex, lower social class constitutes a high risk for suicide in Korea, even after controlling for variables such as age, marital status and area of residence. We conclude that a well-controlled and balanced social welfare system could reduce suicide risk, especially among people in lower social class.