Reviewing the current state of the zero rate of book loan, and after study on several scholars' researches, the au- thor gave a new definition of the zero rate of book loan. Based on that new definition, we analyze examples of the zero rate of book loan within general collection, discipline's documents, annual statistics. We propose that the zero rate of book loan can be treated as the standard for differentiating the three - way stacks, the coefficient of utilization maybe increased by strengthening promotion. We can also use PDA purchasing mode to achieve the...
