While the term 'Demographic Divide' might sometimes refer to differences in population dynamics between groups or regions, in the context of age structure, the concept of 'Demographic Dividend' refers to the potential economic growth that can result from a shift in a country's population age structure, primarily when the proportion of the working-age population (typically defined as 15-59 or 15-64 years) is larger than the dependent population (children and the elderly). The question seems to be referencing this phenomenon using the term 'Demographic Divide'.