NEET-PG 2024 — Community Medicine

Q: In demographic transition analysis, what does the difference between birth rates and death rates represent when plotting demographic changes over time?

Natural increase. ***Natural increase*** - **Natural increase** is specifically defined as the difference between the **birth rate** and the **death rate** in a population. - When plotted over time in demographic transition models, this difference visually represents the **population growth** or decline due to births and deaths alone, excluding migration. *Birth rate* - The **birth rate** is the number of live births per 1,000 people in a given year. - It is only one component of the calculation for natural increase, not the difference itself. *Death rate* - The **death rate** is the number of deaths per 1,000 people in a given year. - It is another component used to calculate natural increase but does not represent the difference between the two rates. *Growth Rate* - The **growth rate** of a population usually includes the effects of both **natural increase** (births minus deaths) and **net migration** (immigration minus emigration). - While natural increase contributes to the overall growth rate, it specifically refers to the growth stemming only from births and deaths, without considering migration.

21 Questions — Page 3 of 3

Q21

In demographic transition analysis, what does the difference between birth rates and death rates represent when plotting demographic changes over time?