Abstract:

It becomes more and more important to have an optimal purchasing ratio for documentation construction for university library in the co-existence era of paper and digital documentation. Guided by the utility function and the theory of marginal rate of substitution in economics, the paper discusses the optimal composition for documentation funding and deduces an optimal ratio for university library. Basing on the relevant data in the fact data-base of university library established by the Ministry of Education, it makes an empirical analysis.

Key words: University library, 　Documentation funding, 　Optimal ratio, 　Economic research