The frequency of nat ural disasters highlights the urgency of more pragmatic relief public goods. Based on the existing research results, the interpretation model, which contain three factors：capacity, efficiency and value,can be established reasonably. These three elements are different respectively;however,they are also implicated with each other. On the one hand, the capacity refrains the value expectation, the efficiency restricts the extent of value realization. And on the other hand, the value, as a motivator,feedbacks on the above two f...
