Increasing the average lifespan decreases the death rate (since ). If the birth rate remains constant, the inflow exceeds the outflow, resulting in a positive net growth rate and exponential population growth.
Conditions: The birth fraction parameter remains unchanged.; The lifespan parameter is increased.; The model follows the equation .
Increasing the average lifespan decreases the death rate (since ). If the birth rate remains constant, the inflow exceeds the outflow, resulting in a positive net growth rate and exponential population growth.
Conditions: The birth fraction parameter remains unchanged.; The lifespan parameter is increased.; The model follows the equation .