This is a basic BIDE (birth, immigration, death, emigration) model.  Not all parts are implemented, however Birth and Death are.

A quick population rate model to help get acquainted to modular designs.

1st Model, Population Model

Rūta Grasberga

Shows the ecological impact of population.

A simple simulation used to observe the California Yellowtail population in San Diego

This simulation examines the linkages between cultural, material, spatial demographic, and hierarchical dynamics.

Influence of migration on the number of working-age population.

This is a first attempt to model I=PAT population growth. Impact on the renewables is equal to P*A*T. Footprint is limited by the amount of renewables left divided by the population. Death rate goes up if the Footprint goes down too far.

Exponential growth model for humans, based on birth rate and death rate, both a function of consumption.

This simulates population growth, culture, energy, and land use. Parameters are somewhat arbitrary, and can be tailored to a specific urban system using real data.

Migration Rate​https://www.indexmundi.com/russia/net_migration_rate.html

Simulation of how tiger population and anti poaching efforts effect the black market value of tiger organs.

Show relation of birth and death rate over time, creating the elements of the demographic transition. This one is for Italy. You can clone this insight for other nations, just plug in the new crude birth and death rates and find the starting population in 1960.

Shows the ecological impact of population.

This model incorporates several options in examining fisheries dynamics and fisheries employment. The two most important aspects are the choice between I)managing based on setting fixed quota versus setting fixed effort , and ii) using the 'scientific advice' for quota setting  versus allowing 'political influence' on quota setting (the assumption here is that you have good estimates of recruitment and stock assessments that form the basis of 'scientific advice' and then 'political influnce' that desires increased quota beyond the scientific advice).

Show prediction of birth and death rate over time, creating the elements of the demographic transition. This one is for Morocco.

Modelagem do estado psicológico de uma população. Inicialmente, todos os indivíduos estão no estado "Calmo". Com o passar do tempo e com as interações mútuas, há o surgimento e progressivo aumento do total de indivíduos com raiva (estado "Raivoso"). Deste estado e, com o passar do tempo, os indivíduos podem evoluir mentalmente e atingirem o estado "Indiferente", nos quais eles se tornam indiferentes à qualquer interação. Outra possibilidade é o indivíduo se enriquecer e, assim, atingir a felicidade (estado "Feliz").

Adapted from Hartmut Bossel's "System Zoo 3 Simulation Models, Economy, Society, Development."

​Population model where the population is summarized in four age groups (children, parents, older people, old people). Used as a base population model for dealing with issues such as employment, care for the elderly, pensions dynamics, etc.

Simulation of how tiger population and anti poaching efforts effect the black market value of tiger organs.