Keita Kinjo

Keita Kinjo
Okinawa International University

PhD

About

19
Publications
918
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46
Citations

Publications

Publications (19)
Conference Paper
Full-text available
This paper describes our development of analogical abduction as an extension to our work on meta level abductive reasoning for rule abduction and predicate invention. Previously, we gave a set of axioms to state the object level causalities in terms of first-order-logic (FOL) clauses, which represent direct and indirect causalities with transitive...
Article
This study analyzes TV program content for viewers with respect to the following three properties: primary utility (intrinsic value by genre, cast, and so on), macro externality, such as the effect of others' past behavior (audience ratings), and state dependence, or the viewer's past actions that determine whether to watch the program. Focusing on...
Article
Full-text available
Consumption behaviors of some goods, such as books, compact disks and so on, are affected by others' consumption behaviors( externalities), which are represented by the amount of sales and their ranking positions. Although numerous attempts have been made to the externalities with micro reference groups, in particular buzz marketing, little attenti...
Article
This paper theoretically analyzes the so-called paradox of choice, introduced by Schwartz (The paradox of choice: why more is less, Harper Perennial, New York, 2004), which posits that having too many choices can make us unhappy. Although one’s possibilities broaden as the number of choices increases, the paradox of choice occurs because among a gr...
Article
This paper provides an analysis of firms’ optimal prices when individual utility exhibits both material and other consumer effects. We construct a model and conduct an analysis in the following four steps: (1) By using a conjoint analysis of data, we set up a hierarchical Bayesian model and estimate its parameters, which are composed of individual...
Article
Full-text available
The purpose of this study is to investigate the relationship between a firm’s strategy and consumers’ decisions in the presence of the paradox of choice and sharing personal information. The paradox of choice implies that having too many choices does not necessarily ensure happiness and sometimes having less is more. A new model is constructed intr...
Article
We consider the social dilemma related to the trolley problem in ethics regarding the driving behavior of an autonomous vehicle (AV) when there are passengers in the AV and pedestrians on the street. To investigate the optimal driving behaviors in different concepts of values, we introduce a general social welfare function (SWF) into our model that...
Article
Full-text available
This study proposes a marketing decision support system (DSS) for firms using case-based and peak-end approaches to model consumers. The proposed DSS is composed of model and estimation methods. We employ a similarity function used in case-based decision theory to examine the degree of similarity between the past and current products offered to a c...
Article
Full-text available
The purpose of our study is to (i) investigate the effects of the number of products, product attributes, and prices on consumer confusion, (ii) conduct a numerical analysis to check the robustness of the results, and (iii) present an example of the cell phone market in Japan. Following an ideal point model and embedding the number of products and...
Article
Full-text available
This paper studies the relationship between a case-based decision theory (CBDT) and an ideal point model (IPM). We show that a case-based decision model (CBDM) can be transformed into an IPM under some assumptions. This transformation can allow us to visualize the relationship among data and simplify the calculations of distance between one current...
Conference Paper
In this paper, we discuss the cognitive role of analogical abduction in skill acquisition. Abductive inference makes it possible to find missing links that explain a given knack in achieving a skillful task. We introduced meta level abduction to realize rule abduction which is mandatory in finding intermediate missing links to be added in knack exp...
Article
We construct a two-period model in which a consumer recognizes the existence of goods after advertised by firms, and total sales of the first period affect the utility of each consumer’s purchase in the second period, indicating a consumption externality. Some consumers see advertisements in the first period and remember the product, whereas some f...
Article
This study analyzes consumer purchasing behavior by introducing voluminous product information into a consumer decision-making model. We focus on the case where consumers and firms have insufficient preferences for product attributes. This situation can apply to the case where a new product or product with new features is introduced into a market....
Article
In this paper, we report our attempt to realize analogical abduction as an extension of our work on meta level abductive framework for rule abduction and predicate invention. In our previous work, we gave a set of axioms to state the object level causalities in terms of first-order-logic (FOL) clauses, which represent direct and indirect causalitie...
Article
The purpose of this study is to investigate the effects of consumption externalities with macro reference groups on firms' optimal prices and profits. Our analysis consists of the following three steps: First, using a conjoint analysis data, we construct a hierarchical Bayesian model and derive an individual utility function. Second, we estimate th...
Article
Most existing works on network analysis mainly focus on only the existence of relations between entities. However, in trying to understand a real network, we naturally use not only the existence of relations but also information on the kind of relations, the attributes in the nodes, and the changes in time. In addition, we can observe some of the m...
Article
Full-text available
We discuss the trust of consumers regarding products and information sources. Today, securing the trust of consumers is a major issue. We verify the effect that the trust of an information source has on the trust of the products it describes. Furthermore, we verify the interdependence involved in trusting in different information sources. We propos...
Article
Full-text available
Skill science begins to attract much research attention recently. One of the most important issue in skill science is to discover rules of cooperative motion. In this problem, such relations as "if state B occurs in one sequence, state A will occur within a few minutes in another sequence" should be learned by analyzing time series data from sensor...

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