A statistic research on changes in the number of bidders for building works projects using the database in the Kanto region
  • Metaadatok
Tartalom: http://hdl.handle.net/10890/51285
Archívum: Műegyetem Digitális Archívum
Gyűjtemény: 1. Tudományos közlemények, publikációk
Konferenciák gyűjteményei
Creative Construction Conference
Creative Construction Conference, 2023
Cím:
A statistic research on changes in the number of bidders for building works projects using the database in the Kanto region
Létrehozó:
Iwamatsu, Jun
Endo, Kazuyoshi
Kiadó:
Budapest University of Technology and Economics
Dátum:
2023-08-03T09:07:47Z
2023-08-03T09:07:47Z
2023
Tartalmi leírás:
In order to ensure the transparency of public works, disclosures of competitive bidding results are widely practiced in accordance with Japanese law. The purpose of research is to collect bidding results data in chronological order and to observe fluctuations. The data collection range is the Kanto region including the Tokyo metropolitan area. We targeted bidding result information of building works over 100,000 data after 2000 fiscal year. First, we surveyed the characteristics such as type, region, scale of construction, and bidding method. Second, we analyzed trends in the number of bidders and successful bid rates, which were calculated by 5 owner agency categories. Over the past 20 years, Japan's public procurement market has undergone a major system change from designated bidding to general competitive bidding. There are many construction markets where the number of participants per bid has decreased over time. Especially in Tokyo, not a little bid ended up with single bidder, which exposed the challenges of competition policy. In 2017 to 2018, the Tokyo Metropolitan Government had tried to cancel the project that was a single bidder, but finally gave up due to disturbance to the implementation of public works projects and the oppositions from the industry. In this paper, by analyzing bidding result data, we have described in detail the situation, such as when and in what layer the number of single bids occurred. Other major findings are as follows: 1) Although the number of bidders tends to decrease at each owner, there are differences depending on the bidding conditions. 2) Looking at the long-term transition of the successful bid rate, it dropped around 2009 to 2011 after the Lehman Shock. 3) In many cases, it was also observed that as the number of bidders decreased, the successful bid rate increased.
Nyelv:
angol
Típus:
könyvfejezet
Formátum:
application/pdf
Azonosító: