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).

HANDY Model of Societal Collapse from Ecological Economics Paper 

This simple model will attempt to demonstrate how modern civilization's groundwater practices are unsustainable and how they are affected by the changing climate.

Fig 3.1 from Jorgen Randers book 2052 a Global Forecast for the Next Forty Years

RUSTIK LL Osrednjeslovenska, SD, Food redistribution with social impacts

RUSTIK LL Osrednjeslovenska, SD, Food redistribution with social impacts

SImplified causal loop diagram of The system dynamics approach for a global evolutionary analysis of sustainable development 2024 article on the Earth4All model

Perspective on Sustainability, Environment, and Development

This insight explores how environmental factors such as air quality, water quality, waste management, and green spaces influence public health outcomes. The model illustrates the relationships between pollution, disease prevalence, healthcare demand, and community well-being. It is intended as an educational systems-thinking example that helps users understand how improvements in environmental management can contribute to healthier populations and more sustainable healthcare systems. The model can be expanded to test different policy scenarios and evaluate their long-term effects on environmental and health indicators.