Global Standards Pattern of Industrial Structure Change and Revised Petty−Clark’s Law

The first aim of this paper is to express quantitatively the global standards pattern of change in industrial　structure, thereby to show Revised Petty−Clark’s law that　includes the back ward bending tendency of the　second　industry, which means that the composition ratio of the　second industry changes to decrease from　increase at the ratio of about 40%.And the second is to show implications and examples of application of the　standards pattern. Then we will be able to attain successfully the first aim and to show the following　implications and examples of　application. They are ①the standards stages of economic development based on　the standards pattern, ②the　difference ratio of industrial structure, which means the degree of gap of the　pattern of a nation from the　standards pattern, and ③the converging tendency of　industrial structure.