Technical and management notes

In various nations, historical changes of an industrial structure (i.e., proportions of primary, secondary, and tertiary industry) are observed in trilinear coordinates where labour force distribution among the three industries and normalized relative incomes are plotted as examples. Necessity is pointed out of some qualitative change in industry, rather than a mere expansion of secondary industry in size, for the attainment of the higher standard of living in a broad sense. It is suggested that future policy in industrialization of a nation may be decided to an extent from the present status of the nation in the figures.