This model shows the operation of a simple economy. It demonstrates the effect of changes in the fractional rate of consumption (or the converse the fractional rate of saving.)

In summary, lower rates of consumption (based on production) result in higher rates of production and consumption in the long-run.

Ocean/atmosphere/biosphere model tuned for interactive economics-based simulations from Y2k on.

This simple model describes wealth accumulation. The value in income is described by the following simple equation:

WIP concepts from Rachel Turner's Book Neo-liberal Ideology

Based on System Zoo EZ412D, EZ411, EZ412A.

The complex model reflects the COVID-19 outbreak in Burnie, Tasmania. The model explains how the COVID-19 outbreak will influence the government policies and economic impacts. The infected population will be based on how many susceptible, infected, and recovered individuals in Burnie. It influences the probability of infected population meeting with susceptible individuals.

The fatality rate will be influenced by the elderly population and pre-existing medical conditions. Even though individuals can recover from COVID-19 disease, some of them will have immunity loss and become part of the susceptible individuals, or they will be diagnosed with long term illnesses (mental and physical). Thus, these variables influence the number of confirmed cases in Burnie and the implementation of government policies.

The government policies depend on the confirmed COVID-19 cases. The government policies include business restrictions, lock down, vaccination and testing rate. These variables have negative impacts on the infection of COVID-19 disease. However, these policies have some negative effects on commercial industry and positive effects on e-commerce and medical industry. These businesses growth rate can influence the economic growth of Burnie with the economic

Most of the variables are adjustable with the slider provided below. They can be adjusted from 0 to 1, which illustrates the percentages associated with the specific variables. They can also be adjusted to three decimal points, i.e., from 0.1 to 0.001.

Assumptions

- The maximum population of Burnie is 20000.
- The maximum number of infected individuals is 100.
- Government policies are triggered when the COVID-19 cases reach 10 or above.
- The government policies include business restrictions, lock down, vaccination and testing rates only. Other policies are not being considered under this model.
- The vaccination policy implemented by the government is compulsory.
- The testing rate is set by the government. The slider should not be changed unless the testing rate is adjusted by the government.
- The fatality rate is influenced by the elderly population and pre-existing medical conditions only. Other factors are not being considered under this model.
- People who recovered from COVID-19 disease will definitely suffer form immunity loss or any other long term illnesses.
- Long term illnesses include mental illnesses and physical illnesses only. Other illnesses are not being considered under this model.
- Economic activities are provided with an assumption value of 1000.
- The higher the number of COVID-19 cases, the more negative impact they have on the economy of Burnie. 

Interesting Insights

A higher recovery rate can decrease the number of COVID-19 cases as well as the probability of infected population meeting with susceptible persons, but it takes longer for the economy to recover compared to a lower recovery rate. A higher recovery rate can generate a larger number of people diagnosed with long term illnesses.

Testing rate triggers multiple variables, such as government policies, positive cases, susceptible and infected individuals. A lower testing rate can decrease the COVID-19 confirmed cases, but it can increase the number of susceptible people. And a higher testing rate can trigger the implementation of government policies, thus decreasing the infection rate. As the testing rate has a strong correlation with the government policies, it can also influence the economy of Burnie. 

Implementation of the Solow model of economic growth with labor enhancing technology.

parameters: s, alpha, delta, n, gA
variables: Y. K, L, C, A
per capita variables: y, k, c, a
per capita and technology variables: y~, k~, c~
steady state variables: y~*, k~*, c~*
all variables come with relative growth rates g

Features:

+steady state from beginning
+one time labor shock
+permanent savings quote shock
+permanent technological growth rate shock

Decreasing steady state variables when starting in steady state are numeric artifacts.

A simple implementation of a Dynamic ISLM model as proposed by Blanchard (1981), and taken from An introduction to economic Dynamics - Shone (1997) - chapter 5. This model might serve as a framework to evaluate economic policies over GDP growth.

Butterfly Effect
Sensitivity To Initial Conditions
(sensitive dependence on initial conditions)
Navier Stokes Equations
Lorenz Attractor
Chaos Theory, Disorder and Entropy



If M is the state space for the map , then  displays sensitive dependence to initial conditions if for any x in M and any δ > 0, there are y in M, with  such that

This is an interface to explore UK-SSP4.

The recent moratorium on deep-sea drilling will reduce the supply of oil. But the world-wide trend is an ever increasing demand for it. This simple CLD  tries to illustrate the dampening effect on demand and on economic activity of diminishing oil supplies and of rising prices: oil prices  affect virtually all products and especially agricultural production. As it becomes more and more difficult to extract oil, prices must rise. At the moment the global recession counteracts this effect, but the recession will not last forever. Is it too early to speak of Peak Oil?

• This model examines how sustainable consumerism is from social, economic, and environmental aspects.  

BRIEF OPENING PARAGRAPH:

Our sustainability challenge surrounds the issues that stem from ineffective mitigation of stormwater. Through this, there is an increased risk of flooding, as stormwater runoff is directly released into rivers. This unregulated runoff creates social, economic, and environmental issues. The increased chance of floods creates social issues such as property damage to homes, destruction of crops and livestock, and severe mental trauma to those affected. The environment is also impacted by this issue, as improper stormwater mitigation creates an increase in temperature through the Urban Heated Island Effect. Finally, this challenge raises several economic issues, as funds for repairing damages may become limited through repeated flood damage, with property value will plummeting as a result. Our model will present the challenge of ineffective stormwater mitigation, and the social, economic, and environmental issues that occur as a result.

BRIEF CLOSING PARAGRAPH:

Through our model, the issues of improper mitigation of runoff have been presented. It is clear that without regulation, stormwater runoff can be detrimental to our society, economy, and our environment. Living in an area that rains often, such as Greater Vancouver, this issue is extremely relevant, as we are directly impacted by unregulated runoff. When running a simulation of our model on InsightMaker, groundwater is shown to increase initially, and then quickly plateaus. This is because groundwater is not infinite, and if this problem continues to persist, we will eventually run out of drinkable water. It is important that we raise awareness to this issue, and that we understand its impacts from societal, economic, and environmental perspectives.

SEPARATE PAGE FOR A DETAILED DESCRIPTION OF THE MODEL AND THE ISSUES EXPLAINED IN DETAIL:

https://docs.google.com/document/d/11-Md0b_tNKTJMsKvJmUB2U3A-S9YERFpcXZSmZ4JPco/edit?usp=sharing

WIP Summary of Miller 2015 PCD article for the Compelling Case for Prevention Project Scoping Study.

This model shows the operation of an extremely simple economy. The system produces and consumes each item (or good) at a fixed rate.

When production exceeds consumption, consumer goods accumulate in stocks. Trading may occur between actors in this system. That will not, however, affect the quantities of the stocks of goods. It only affects ownership (not a concern of this model.)

This model demonstrate how the exisitng tested COVID cases effects economic recovery via goverment intervenes.

Smithian growth model from Michael Joffe Fig. 3.7 p57 Ch3 Feedback Economics Book

Ocean/atmosphere/biosphere model tuned for interactive economics-based simulations from Y2k on.

​Climate Sector Boundary Diagram By Guy Lakeman