# 三田図書館・情報学会誌論文（論文ID LIS040029）

- 著者
- 岸田和明
- 和文タイトル
- 規模の反有効性に基づく公共図書館の貸出モデル
- 英文タイトル
- A Mathematical Model on Public Library Loan Incorporating an Inverse Size Effect
- 掲載号・頁
- No.40, p.29-35
- 発行日
- 2000-06-30
- 英文抄録
The purpose of this paper is to propose a new mathematical model for predicting the amount of loan at public libraries, and to investigate the validity of the model by using statistical data on public libraries at Saitama Prefecture in Japan. The model is L = aCPexp(-bC), where L is the number of times books are circulated in a library, C is the number of books held at the library, P is the population within the service area, and a and b are parameters. The model explains well statistical variation of the amount of loan at Saitama Prefecture. It can be said that the result shows a sort of “inverse effect” of size of collection or population, which is represented by exp(-bC) in the model, on the increase in loan. Also, a simple simulation based on the model is tried to assess the effectiveness of new sites for access.

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