周阿江在对中美两国保管期限表进行比较研究后，在《福建档案》2000年第3期提出：美国的保管期限的“标时法”不适应我国的国情。首先，美国保管期限表制定的指导思想之一是近年来提出的优化理论或称比例鉴定理论、费用——代价率理论。这一理论将保管费用和档案产生的效益相联 Zhou Ajiang made a comparative study of the retention schedules of China and the United States. After Fujian Provincial Archives published the third issue in 2000, the “standard time law” of the custodial period in the United States was not suitable for China’s national conditions. First of all, one of the guiding principles formulated by the U.S. custody deadline is the theory of optimization or proportion appraisal proposed in recent years, and the cost-price ratio theory. This theory links the cost of custody with the benefits of a file