アジア・オセアニア研究教育機構(Q-AOS)ポスターセッション

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7.Madoka Inoue（Graduate School of Economics / Master's Course）
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Investigation of Technology Development Priorities for Circular Economy Using Patent Decomposition Analysis

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We investigated the changes in development priorities of Circular Economy (CE) related technologies using LMDI decomposition analysis. The results show that in both global and regional analyses, the priorities of "Hydroponics/Vertical Farming" and "Resource Recovery" have increased in recent years, while the priority of "Biofuels" has decreased in the 2015-2019 period. Additionally, there were some differences among regions. These differences in the characteristics of each CE technology are important information for understanding market demand and priority technology types, and for formulating policies and strategies to achieve CE.

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Thank you for your poster presentation. I think you should explain how you define the parameters (i.e., priority, CE, and total) in this study. What kind of criteria for each model parameter did you use? What is the implication of these parameters and why choosing only 4 types of the technology?
Name
Suyantara
Date
2021/10/18
Title
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Thank you for your comment. I apologize for the lack of explanation. First, I would like to add about the 3 parameters. In the LMDI decomposition analysis, the number of applications for a specific patent is on the left side, and in this study, I used the number of applications for one of the 4 technical fields of CE defined in Table 1. In the poster, BIOFUEL is included as an example. Then, on the right side, I divided the number of patents in the specific field in CE (in the poster, the number of patents in BIOFUEL) by the total number of patents in CE, i.e., the total number of patents in the 4 technical fields, and then divided the total number of patents in CE by the total number of patents in all fields, including non-CE, and multiply by the total number of patents in all fields. I defined PRIORITY index as the number of applications for a specific patent in the CE (BIOFUEL in the poster) divided by the total number of patents in the CE, CE index as the total number of CE divided by the total number of patents in all fields, and TOTAL index as the total number of patents in all fields. PRIORITY is an indicator of the development priority of each specific technology within the overall CE, CE is an indicator of the proportion and importance of CE technology fields, and TOTAL is an indicator of the scale of overall patent applications. Second, regarding the selection of technology areas, previous studies have shown that the system diagram of CE is largely divided into two flows: "RENEWABLE FLOW MANAGEMENT" such as bio-chemical and farming, and "STOCK MANAGEMENT" such as maintain and recycle. In this study, I selected bio-related technologies from the "RENEWABLE FLOW MANAGEMENT" flow (divided into the 3 fields of "BIOFUEL," "Genetically Edited Plants", and "Hydroponics/Vertical farming" because of their broad definitions) and "Resource Recovery" technologies from the "STOCK MANAGEMENT" flow. It means that the technology areas were selected from each flow.
Name
Madoka Inoue
Date
2021/10/21