Explain how demographic data can assist policy makers in places like Paris, France, Ireland, and Eastern Europe.

Demographic data is data about characteristics of population like gender, income and age. They have huge effect on how policy is formed on the basis of this data.

Explanation:

Demographic data is one of the most important aspects that the policy makers keep in mind while making policies for the growth and the development of the people of the various countries.

If the population of the country consists of old age people more, then the policy should include more stress on health, if it has more of young people then the stress should be more on development of infrastructure and communication. High income countries will have separate policies compared to polocies of low income countries.