論文 - 清水　たくみ

社会を進化させるデータエコシステムをどのように設計するのか

深見嘉明, 清水たくみ

人工知能学会誌 （一般社団法人 人工知能学会）  37 （ 5 ） 575 - 581 2022年

ISSN  21882266

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Models of Exchanged Datasets and Interactions of Buyers in the Data Market: Toward Multi-Agent Simulators for System Design

Teruaki Hayashi, Hiroyasu Matsushima, Hiroki Sakaji, Yoshiaki Fukami, Takumi Shimizu

Procedia Computer Science （Procedia Computer Science）  207 （ 2022 ） 1695 - 1704 2022年

査読有り,  ISSN  1877-0509

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Value creation by reusing data as exchangeable resources has been widely studied as a new source of innovation, resulting in the establishment of a data market and its ecosystem. However, owing to the nascent nature of the market, observable information on exchanged datasets and interactions among stakeholders, such as buyers and providers, in the market are limited. Therefore, a lack of observable information that contributes to designing the market system and formulating regulations to promote the sound growth of data markets exists. This study modeled exchanged datasets and data buyers as agents, the smallest units of the data market components, and prepared seven scenarios for four market sizes. We simulated the effects of datasets and agent models with different market sizes on the agents' data purchases and emergence of popular datasets and discussed the factors that affect the purchase frequency distribution of the datasets. We present the experimental results and new implications for developing a data market simulator. The development of this simulator is expected to significantly advance research on the market understanding and system design in data markets.

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Technology Standardization for Innovation: How Google Leverages an Open Digital Platform

Yoshiaki Fukami, Takumi Shimizu

Information 12 （ 11 ） 1 - 16 2021年10月

共著, 査読有り

Data Combination for Problem-solving: A Case of an Open Data Exchange Platform

T Hayashi, H Sakaji, H Matsushima, Y Fukami, T Shimizu, Y Ohsawa

The Review of Socionetwork Strategies, 1-14 （Springer Science and Business Media LLC）  2021年

研究論文（学術雑誌）, 共著, 査読有り,  ISSN  2523-3173

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<title>Abstract</title>In recent years, rather than enclosing data within a single organization, exchanging and combining data from different domains has become an emerging practice. Many studies have discussed the economic and utility value of data and data exchange, but the characteristics of data that contribute to problem-solving through data combination have not been fully understood. In big data and interdisciplinary data combinations, large-scale data with many variables are expected to be used, and value is expected to be created by combining data as much as possible. In this study, we conducted three experiments to investigate the characteristics of data, focusing on the relationships between data combinations and variables in each dataset, using empirical data shared by the local government. The results indicate that even datasets that have a few variables are frequently used to propose solutions for problem-solving. Moreover, we found that even if the datasets in the solution do not have common variables, there are some well-established solutions to these problems. The findings of this study shed light on the mechanisms behind data combination for solving problems involving multiple datasets and variables.

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Growing Process of Communities on Data Platforms: Case Analysis of a COVID-19 Dataset

Hayashi T., Shimizu T., Fukami Y., Sakaji H., Matsushima H.

Proceedings - 2021 IEEE International Conference on Big Data, Big Data 2021 （Proceedings - 2021 IEEE International Conference on Big Data, Big Data 2021）     3466 - 3471 2021年

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In recent years, there have been growing expectations for the creation of new businesses and the improvement of the value of existing services by exchanging data in different fields. Data stored in-house within organizations have become a new source of innovation. While there is a high need for the value creation of data, determining the data value is not an easy task, as there is a wide range of factors to be considered, such as data pricing, acquisition cost, usage value, and update frequency. In this study, we observe communication, such as the sharing of know-hows in data exchange and analysis, and discuss the growing process of a community on the data platform. For the experiment, we focused on the data community in the COVID-19 disaster and used a unique dataset from the data platform Kaggle, which is the data analysis competition service. The results suggest that user actions differ in the discussion of the dataset and analysis. Moreover, providing topics, user participation, and activating actions in the early stages after the dataset is released are essential for forming a data community. We argue that the actions on the data analysis, such as comments and votes, are also crucial for fostering a common understanding of the data value.

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データ流通エコシステムにおけるプラットフォームを媒介とした価値創造

清水たくみ， 早矢仕晃章， 深見嘉明， 松島裕康， 坂地泰紀， 大澤幸生

情報通信政策研究 4 (1), 103-123 （総務省情報通信政策研究所）  4 （ 1 ） 103 - 123 2020年

研究論文（学術雑誌）, 単著, 査読有り,  ISSN  2433-6254

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<p>様々な産業・経済システムのデジタル化が進展する中、デジタルデータを活用した価値創造への期待が高まっている。その流れを受けて、異なる事業者間でデータを交換・取引するデータ流通エコシステムが萌芽し、新たなイノベーションの源泉として注目され始めている。このようにデータ流通を通じた価値創造への関心は高まっているものの、法制度設計と技術仕様が複雑に絡み合うことから、データ流通エコシステム全体を包括的に捉えた議論が進んでいるとは言い難い。加えて、データ流通プラットフォームの仕組みやサービスについてのシステム面・ビジネス面に絞られた形での議論は存在する一方で、実際に取り扱われるデータ自体の特徴やデータ間の関係性などのデータ流通メカニズムについて十分には明らかになっていない。そこで本論文では、データ流通プラットフォームにおけるデータ連携・相互作用メカニズムを、実証分析に基づいて検討した。プラットフォーム上のデータネットワーク分析から、1) 連携可能性を高めるデータの特徴、2) 連携を促進するデータ共有条件、及び3) データネットワーク構造の特徴に関する知見を得た。具体的には、「時間」や「場所」などに関わる変数が多様な異種データの連携可能性を高めることが示された。また、秘匿データと共有可能データの混在が密なネットワーク構造の構成を促し、異分野間データ連携の成立可能性を高めることが明らかになった。加えて、データネットワークは人間関係と似た「局所的に密、大域的に疎」な構造をしており、疎の部分を埋めるデータを提供することで、異分野をつなげるデータ活用を活性化できる可能性が示唆された。これら分析結果をもとに、データ流通プラットフォームの設計・運営及びデータエコノミー推進への示唆と課題を議論する。</p>

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Who Becomes a High Performing Leader in Knowledge Sharing Online Communities?

Takumi Shimizu

Journal of the Japan Society for Management Information 27 （ 1 ） 51 - 66 2018年06月

研究論文（学術雑誌）, 単著, 査読有り

Innovating through standardization: How google leverages the value of open digital platforms

Fukami Y., Shimizu T.

Proceedings of the 22nd Pacific Asia Conference on Information Systems - Opportunities and Challenges for the Digitized Society: Are We Ready?, PACIS 2018 （Proceedings of the 22nd Pacific Asia Conference on Information Systems - Opportunities and Challenges for the Digitized Society: Are We Ready?, PACIS 2018）     1 - 14 2018年

共著, 査読有り,  ISSN  9784902590838

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The purpose of this paper is to examine how an actor strategically develops and diffuses technology standards that align with innovation trajectories while maintaining a consensus with competitors. We conduct a field study of HTML5 standardization and examine how Google strategically influences the development and diffusion of HTML5 toward their favorable standard trajectories. We show that Google has adopted two strategic policies (integrating outside technologies and avoiding the monetization of technologies) and engaged in two relational practices (forming alliances with browser vendors and engaging developer communities) to realize an open Web application platform on the HTML5 while competing and coordinating with other actors. Google attracts application developers and browser vendors to collaboratively develop HTML5 specifications and HTML5-compatible products and services, which have enriched Google's open Web application strategy. These relational practices were enabled and amplified by non-commercial policies for corresponding web applications and the use of other parties' technologies.

Coordinating collective framing process with heterogeneous actors in technology standard development

T Shimizu

Academy of Management Proceedings 2018 (1), 13077 2018年

Online Communities and Knowledge Collaborations

S Faraj, T Shimizu

Oxford Research Encyclopedia of Business and Management    1 - 20 2018年

研究論文（学術雑誌）, 共著, 査読有り

Material-Discursive Practices in Technology Standards Development: A Topic-Modeling Approach to Technology Evolution

Takumi Shimizu

Proceedings of 23rd Americas Conference on Information Systems    1 - 10 2017年08月

単著, 査読有り

Web2.0 時代における創造のマネジメント

清水たくみ, 井庭崇

情報社会学会誌 2 （ 2 ） 144 - 158 2007年06月

研究論文（学術雑誌）, 共著, 査読有り