DezNutz wrote:Can you update your Population Growth Equation. It is missing Parentheses. You have 3 open (Left) parentheses but 5 close (right) parentheses.
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Population Growth = ( -0.1% * ((Port Population/1000000) * 6 / 950) + (1/19)) + 0.2% * (Availability/Consumption) ) / TM
CJ, the above formula has a flaw in it besides the numerous missing parentheses which make it really hard to determine how the formula was supposed to work.
Based on your statements of ~300M is where positive and negative growth changes I ran some simple calculations.
Keeping it simple I assumed that Availability and Consumption were equal (1/1 = 1), eliminated the TM, and converted to decimals for the two percentages.
To better understand the formula, I decided to find the population (X) in which the formula of -0.001X + 0.002 = 0 (-0.1%X + 0.2% = 0)
Using the original provided formula did not make any sense especially when considering the 1/19 and lack of parentheses. In my previous calculations I noted that 1/19 = 0.05263
So I choose to run the calculation -0.001 * (Pop / 1M * 6 / 950) with out the 1/19 on a population of 300M. I got -0.00189. Close but not exact.
Being so close to -0.002, I decided to drop the -0.001 from the calculation and just work to achieve 2 by increasing the population.
Low and behold on a population of 325M using the formula (Pop / 1M * 6 / 950), the result came to 2.05263
The 1/19 finally made sense, but not in the manner the original formula provided.
I believe the correct Population Growth Formula is as follows:
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Population Growth = (-0.1% * ( ( (Population/1000000) * 6 / 950) - (1/19)) + 0.2% * (Availability/Consumption) ) / TM
Additionally, the 6/950 can be reduced to 3/475. They are mathematically the same.
This makes the population of 325M the exact population that separates positive and negative growth, assuming that supply = demand and there is no oversupply.
Based on my calculations:
A port with a population of 2.1B would have a supply/demand based growth rate of -1.32% or -27.74M if no cargo is supplied to the port.
A port with a population of 25M would have a supply/demand based growth rate of -0.01% or -2632 if no cargo is supplied to the port.
Additionally, is the TM necessary? A port with a population of 2.1B would take 242 days for it to reach a population of 500.5M if no cargo is supplied to the port, and with no black deaths, transport immigrants, crews hired, or work as a porter used to influence the population.