Explain Which economic factors are impacted the most by demographic change and why?

Description

The subject is Macroeconomics : research question : Which economic factors are impacted the most by demographic change and why?

-Give relating examples using graphs or other sources.

-The research must be fully general and not country focussed but briefly give an example by using the USA and Germany.

-If you have any questions regarding the research paper please message me and thank you very much!