The meaning of demographics

pi-r8

Luddite
Joined
May 1, 2006
Messages
2,564
Location
Babylon
I'd like to know what all the numbers in the demographics screen mean, since this game doesn't give a lot of info on how you compare to the other nations. Here's what's available:

population:based on the population of your cities, however it's weighted towards big cities. One big city is worth a lot more tn several small cities. I'm not sure how it's calculated exactly.
crop yield:The sum of all food production in your empire (not food surplus)
production:The sum of how much each of your cities is currently producing
gnp:total income (NOT profit. You can be breaking even or even losing money, but still have a large gnp. Says nothing about research or culture)
land:Number of land tiles within your borders times 10,000.
soldiers:Based on army strength. Only military units add to this, and more advanced units count for more. It's Possible to have 0 soldiers.
approval: based on happiness, not sure how it's calculated
literacy: based on the ratio of science to population, but again i'm not sure how it's calculated.
 
I'd bet the happiness stat is based on your net happiness. I'm in a. Game right now where I'm dead last in that stat, and that's because I've -20 happness.
 
I'd bet the happiness stat is based on your net happiness. I'm in a. Game right now where I'm dead last in that stat, and that's because I've -20 happness.

well sure, but what's the formula? how much happiness do you need to be at 100%?
 
Some data:

Prince difficulty, Huge Map, 90% approval, 10 happiness, 390000 population according to demographics screen, 17 population in cities.

I don't see anything obvious jumping out as "oh yeah, I'm 90% of that".
 
In my current Ottoman game I am generating 43 :) and 36 :mad: (net 7 :)) and my approval is listed as 81%.

In an earlier game as Greece I at one point had 141 :) and 129 :mad: (net 12 :)) and approval was 96%.

I think I see a patern. Approval seems to be 60% + (3% * net happiness). This also fits saraid's data (60% + 30% = 90%).

In my Greek save I have 15,868,000 population in demographics and the populations of my cities are: 16, 16, 15, 14, 14, 13, 11, 10, 10, 8, seven cities with 7 pop, 6, 5, 5, 5, 5, 4, and 4. Total population is 210. And I realize this is too big for making sense out of it, but it will be good for testing whatever formula we come up with.

So I laoded my Iroquois save and here I have 382,000 population in demographics and my two cities are sizes 7 and 6.

In a later save from the same game it's 2,110,000 population in demographics and cities are 11, 11, 7, and 7.

I just started a brand new game. Demographics list 8246 soldiers and all I have is my warrior. Later building a scout brough my soldiers to 10,198.

Approval is 87% which fits base 9 Happines with no :mad: generated by number and size of cities (before settling). I also see that the highest happines is 96% so apparently on king the AI gets a +3 bonus to happines.

After settling my population in demographics is listed as 1000. With city size 2 the population is listed as 6000. At size 3 it's 21,000. Size 4 is 48,000. Making a settler and ploping down a second city brings that to 49,000 population. So apparently at least the effects of individual cities are added together linearly. Size 5 seems to be 90,000 people and size 6 is 150,000. That means size 7 must be 232,000 population (based on my first Iroquois save).

That should be plenty of data, but I don't see a formula at the moment.
 
If those figures for the city sizes 1-6 are right then the population formula could be

n*(n^2/2+3/2*n-2)

So with city size is 5:
5*(5^2/2+3/2*5-2) = 5*(12,5+7,5-2)=90

It matches for sizes 1-6 otherwise except for n=1 which is ok.

For 6: 150
For 7: 231
For 11: 825

231+150 = 381, so this one is of by one.
825+825+231+231 = 2112, and this off by two.

But for that 24 city empire it's way off: 16041 vs 15868.

But maybe this is a good start. :)
 
Wow, given that at least in America presidential approval usually hovers in the 40-50 range and Congress is having a good day if they break 25% approval, the citizens in Civ are really lenient! Someone, tell Nancy Pelosi to build more Colosseums!
 
Wow, given that at least in America presidential approval usually hovers in the 40-50 range and Congress is having a good day if they break 25% approval, the citizens in Civ are really lenient! Someone, tell Nancy Pelosi to build more Colosseums!

If you have a huge empire and you're hovering around the happy/unhappy line (or even just below it) you'll be in the 50/60% range. Doesn't seem that off to me.
 
More data:
size 8 = 337,000 population
size 9 = 469,000 population
size 10 = 630,000 population
size 11 = 823,000 population
I missed 12
size 13 = 1,315,000 population
size 14 = 1,618,000 population
size 15 = 1,963,000 population
size 16 = 2,352,000 population
size 17 = 2,787,000 population
size 18 = 3,271,000 population
size 19 = 3,806,000 population
size 20 = 4,394,000 population
size 21 = 5,037,000 population
size 22 = 5,738,000 population
size 23 = 6,498,000 population
size 24 = 7,321,000 population
size 25 = 8,207,000 population
size 26 = 9,160,000 population
size 27 = 10,181,000 population
size 28 = 11,273,000 population
size 29 = 12,436,000 population
size 30 = 13,675,000 population
size 31 = 14,990,000 population
 
wow good detective work, Nunya and aatu!
Looks like the only one left to figure out is the literacy stat (unless someones wants to work out how many soldiers each type of unit is worth).
 
Literacy appears to me to just be the % of the tech tree you have researched or somewhere close too it. As a partial quick test, I got a Great Scientist and checked my Literacy rate. I popped a tech with the Scientists and then looked at the Literacy stat again and it had gone up a few points. Nothing else in my empire had changed.
 
Wow, given that at least in America presidential approval usually hovers in the 40-50 range and Congress is having a good day if they break 25% approval, the citizens in Civ are really lenient! Someone, tell Nancy Pelosi to build more Colosseums!

still laughing at this.
 
literacy: based on the ratio of science to population, but again i'm not sure how it's calculated.

Literacy appears to me to just be the % of the tech tree you have researched or somewhere close too it. As a partial quick test, I got a Great Scientist and checked my Literacy rate. I popped a tech with the Scientists and then looked at the Literacy stat again and it had gone up a few points. Nothing else in my empire had changed.


Uncle Joe is correct.

Literacy increases with each technology, and never decreases. I think it is #researched techs/#total techs. Some ancient age techs don't seem to increase literacy, however.
 
Uncle Joe is correct.

Literacy increases with each technology, and never decreases. I think it is #researched techs/#total techs. Some ancient age techs don't seem to increase literacy, however.

I've found this also, it doesn't seem to consider your beakers per turn, this is more noticible if you beeline some routes, leaving lots of 'cheap' techs unresearched. :)
 
I've found this also, it doesn't seem to consider your beakers per turn, this is more noticible if you beeline some routes, leaving lots of 'cheap' techs unresearched. :)

I think literacy is based on the techs after writing. Techs before it don't add to it.
 
In my current Ottoman game I am generating 43 :) and 36 :mad: (net 7 :)) and my approval is listed as 81%.

In an earlier game as Greece I at one point had 141 :) and 129 :mad: (net 12 :)) and approval was 96%.

I think I see a patern. Approval seems to be 60% + (3% * net happiness). This also fits saraid's data (60% + 30% = 90%).

In my Greek save I have 15,868,000 population in demographics and the populations of my cities are: 16, 16, 15, 14, 14, 13, 11, 10, 10, 8, seven cities with 7 pop, 6, 5, 5, 5, 5, 4, and 4. Total population is 210. And I realize this is too big for making sense out of it, but it will be good for testing whatever formula we come up with.

So I laoded my Iroquois save and here I have 382,000 population in demographics and my two cities are sizes 7 and 6.

In a later save from the same game it's 2,110,000 population in demographics and cities are 11, 11, 7, and 7.

I just started a brand new game. Demographics list 8246 soldiers and all I have is my warrior. Later building a scout brough my soldiers to 10,198.

Approval is 87% which fits base 9 Happines with no :mad: generated by number and size of cities (before settling). I also see that the highest happines is 96% so apparently on king the AI gets a +3 bonus to happines.

After settling my population in demographics is listed as 1000. With city size 2 the population is listed as 6000. At size 3 it's 21,000. Size 4 is 48,000. Making a settler and ploping down a second city brings that to 49,000 population. So apparently at least the effects of individual cities are added together linearly. Size 5 seems to be 90,000 people and size 6 is 150,000. That means size 7 must be 232,000 population (based on my first Iroquois save).

That should be plenty of data, but I don't see a formula at the moment.

You can't just add the population values together to calculate the total pop. A city of 1 pop has 1,000 citizens but a city of 2 has 6,000 (or something around that). The population of a city doesn't increase linearly as the number of workable "citizens" goes up, so a city of 100 citizens will have much more pop than 100 cities with 1 citizen each.
 
Just for the sake of completeness: given the numbers above the population can be approximated quite well with the polynomial

y = -0.00139963244 * x^4 + 0.4812530591 * x^3 + 2.229934025 * x^2 - 6.693706924 * x + 8.543720415

where y is the number in thousands displayed in the demographics and x is the number displayed on the city.
 
Just for the sake of completeness: given the numbers above the population can be approximated quite well with the polynomial

y = -0.00139963244 * x^4 + 0.4812530591 * x^3 + 2.229934025 * x^2 - 6.693706924 * x + 8.543720415

where y is the number in thousands displayed in the demographics and x is the number displayed on the city.

This isn't correct.

In my current game, I have 4 cities, total population is 107. The number predicted is 431,000. The number in my demographic is 55 million.

My capital alone (43 pop) has 37 million.

I think this depends on several factors, one of which is the current era that the game is in. My 20 pop cities are 4.5 million each.
 
Top Bottom