Emojis and stickers are becoming increasingly popular in computer-mediated communications. The present study examined the associations between personality traits and people's reasons and patterns for using both emojis and stickers. Participants (n = 312) completed three online questionnaires assessing shyness, the Big Five personality traits, and why and how they used emojis and stickers. Results revealed that shyness, neuroticism, extraversion, and agreeableness were correlated with different reasons of usage. Moreover, some participants exhibited a tendency to adjust frequency of usage depending on who the target person was and whether they were in a private or group chat. People who showed such tendencies were found to differ in personality with those who did not. Some differences in usage patterns were also observed between emojis and stickers. Together, the present study has produced more insight into how emojis and stickers can help people with different personality traits to achieve different purposes in their daily communication.

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Asymmetric cost behavior or stickiness has drawn attention in recent years. Although studies have focused on the causes of and factors contributing to cost stickiness, few have investigated its economic consequences. This paper empirically examines how firms’ asymmetric behavior influences their research and development (R&D) investment. Because cost stickiness increases innovation failure cost, we expect cost stickiness to reduce R&D expenditure. By using data from Chinese listed manufacturing firms between 2007 and 2015, we empirically test and confirm this hypothesis. On average, with one standard deviation added to the mean, R&D expenditure over total asset and that over total sales are reduced by 2.7% and 2.2%, respectively. Furthermore, the dampening effect of cost stickiness on R&D investment becomes more prominent with increasing risks faced by firms. Only SG&A cost stickiness exerts a dampening effect on R&D, whereas cost of goods sold (COGS) and total cost stickiness demonstrate no significant effects.

Social security primarily improves residents’ welfare and ensures labor market sustainability. This study presents a new view of the association between health insurance and labor supply by using data from the China Health and Retirement Longitudinal Study. The results reveal that the health insurance system has a remarkable effect on labor supply. The health insurance coverage tends to encourage middle-aged and elderly farmers to increase their farm labor participation rate and working time, especially for their household agricultural labor participation rate and working time. However, it also reduces the non-farm labor participation rate and working time. Different types of health insurance have diverse effects on labor supply. The new cooperative medical insurance has a stronger pull-back effect. It encourages the middle-aged and elderly farmers to leave the urban non-farm sector and transfer to rural areas to engage in their household agricultural work. The urban employee medical insurance encourages farmers to reduce self-employed labor supply and increase employed work. The supplemental health insurance tends to reduce the labor supply of farm employed and non-farm labor supply, but improve the farm labor supply. Furthermore, urban resident medical insurance and government medical insurance encourage farmers to quit directly from the labor market. In conclusion, the health insurance system is facilitating change in the labor market. Policy-makers should pay full attention to such impacts while improving the health insurance system’s design and operation in China.

Language is conventional because word meanings are shared among different people. The present study examined Chinese infants’ understanding of the language convention that different people should generalize words in the same way. Thirteen-month-old Mandarin-speaking Chinese infants repeatedly viewed a speaker providing a novel label for a target object in the presence of a distractor object. Next, the objects changed colour and infants viewed the same speaker and a new speaker providing the label for either the different coloured target or distractor. They were also asked by both speakers to locate the correct referent of the label. Results revealed that infants expected both speakers to generalize the label to objects that belonged to the target category. This is the first evidence demonstrating that Chinese infants perceive word generalization as a form of shared convention.