On the coexistence of reciprocity and materialism

This paper studies the problem of the long-run preferences distribution in a large population using an evolutionary approach. Special attention is given to the investigation of the property of the mixed population equilibria, in which materialists and reciprocators coexist. Some of the players with reciprocal preference care about not only their own material payoffs but also about those of others, while the remaining ones are materialists who maximize their own material payoffs.Evolution

Influence of Over-and Underconfidence on Marriage Market

This paper is an examination of the influence of an individual’s self-confidence (over- confidence or underconfidence) on others in the marriage market. We consider a model in which there are three types of men and women according to marital charm, and some men/women overestimate/underestimate their own types. The result obtained is that the self-confidence of some single individuals affects not only themselves but also the marital behavior of other rational singles in the market. Furthermore, self-confidence improves the welfare of the economy if there are enough underconfident men/women or if there are sufficiently few overconfident men/women in the marriage market.marriage, search, overconfidence, underconfidence

Variety expansion and fertility rates

To investigate how fertility rates interrelate with the modern economy, we construct a simple model in which variety expansion of consumption goods reduces fertility rates. In our model, variety expansion reduces the relative price of a composite of differentiated goods compared to child- rearing costs. Thus, parents raise the expenditure share for differentiated goods and lower the number of children. We show that this model can be applied to a growth model in which economic growth progresses with variety expansion of consumption goods and fertility rates decrease with economic growth. Thus, we show a new mechanism for fertility decline, and this mechanism can be applied to a growth model.Consumerism; Fertility rates; Variety expansion; Economic growth

Exit and Voice in a Marriage Market

In this paper, we present a model in which agents choose voice, exit, or stay options when their marital condition becomes bad. The voice option can be interpreted as a spouses e¤ort or investment in the household to resolve his/her dissatisfaction and improve the marital condition. If a spouse hopes to divorce, he/she chooses the exitoption. If a spouse does not hope to express his/her opinion and divorce, he/she chooses the stayoption. We focus on the role of exitand voicein a marriage and investigate the e¤ects of a divorce law that is based on fault or no-fault on divorce rates. Our study shows that divorce rates tend to be too high under a unilateral divorce law in the non-transferable utility case. On the other hand, mutual-consent divorce law generates multiple equilibria, and divorce rates are then ine ¢ cient even in the transferable utility case. In this multiple equilibrium case

One-sided learning about one’s own type in a two-sided search model: The case of n types of agents

This study analyzes a two-sided search model in which agents are vertically heterogeneous and agents on one side do not know their own type. Agents with imperfect self-knowledge update their beliefs based on the offers or rejections they receive from others. The results are as follows. An agent with imperfect self-knowledge lowers his or her reservation level if the agent receives a rejection that leads him or her to revise belief downward. However, an agent with imperfect self-knowledge does not raise his or her reservation level even if the agent receives an offer that leads him or her to revise his or her belief upward. As a result, an agent with imperfect self-knowledge has the highest reservation level when he or she has just entered the market; after that, a series of meetings gradually lowers his or her reservation level over the duration of the search.JEL Classification Codes: D82, D83, J12http://doi.org/10.24545/0000134

Development of Art Fashion by Integrating Art and Digital Textile Printing

[NICOGRAPH International 2022] 4-5 June 2022, virtual conference.Recently digital art using digital technology has emerged and has been well recognized. On the other hand, digital textile printing technology has recently emerged in the fashion world, making it relatively easy to produce small-lot, high-mix garments. Combining this digital art with digital textile printing creates new possibilities for art to enter our everyday life as clothing. In this paper, we will describe the contents of our attempt to create fashion from digital art under the concept of "wearing art" through joint research between companies and universities

Development of Art Fashion by Integrating Digital Art and Digital Textile Printing

[2022 International Conference for ADADA + CUMULUS] 26 - 27 November 2022, OnlineFashion and art are essential elements of human life because they enrich people's daily lives. As art has a business model of small-scale production and fashion has a business model of mass production, there was no point of contact between the two. However, these two areas are approaching with the spread of digital art in the art world and the emergence of digital textile printing technology in the fashion world. Combining digital art and digital textile printing creates new possibilities for art to enter our everyday life as art fashion. This paper describes our attempt to create fashion from digital art under the concept of "wearing art" through joint research between a university and a company