Sector growth. It is important to assess what proportion of a country’s output derives from the activities that are particularly important in the knowledge-based postindustrial age. Both GNP and per-capita GNP describe the levels of capital resources in aggregate and distributed terms respectively. However, they do not identify how these capital resources are produced. Understanding whether a country’s overall growth derives from certain leading-edge sectors as opposed to “sunset” sectors is important for assessing a nation’s power capabilities. Because the leading sectors today remain information and communications, in addition to materials and manufacturing, understanding where the sources of accumulation lie in these three areas provides a qualitative profile of the structure of capital generation in a country. It is also important to assess the distribution of growth across the key sectors.