Domestic

Domestic is the first sub-category of Headquarters. This is where players manage their population, happiness and land. Population is very important. It is needed to work your buildings and to tax. The amount of citizens you have is dependent on the amount of your housing units. You could buy more housing units, upgrade the ones you already have, or kidnap enemy citizens during wars. Having more people than you have housing for results in homelessness. Homeless people will work for your country for a while, but they will eventually leave. Population happiness is also important. If your citizens aren't happy enough, they will leave your country. It is also important in many formulas used in the game. Remember to keep an eye on your land, because you need it to build more houses and buildings.

Population
Population is the first tab under the domestic category. It shows your population, the maximum population you could have, your population growth and your population health. To the right, it also lists your house quantity, house capacity and housing upkeep. You can also build more houses.

House Building
Houses require 0.3 land to build. As the player progresses, housing costs will become more and more expensive, based on the amount of houses you already have. If you do not have the required resources, the ones you cannot afford will become red, and the option to build a house will disappear. There is also an option to destroy a house. You must confirm by ticking the confirm destruction option, and then pressing the destroy house button. You will not be refunded anything.

Happiness
Population happiness is an indicator of how well you are treating your population. The higher the score, the better, and the maximum is 100 points, while 25 is the minimum. According to the game,

"Population happiness is a global modifier for many formulas used in your nation. The modifier scale is on a base value of 90. This means that a score of 90 will result in a modifier of 100%. A happiness score of 100 will result in a modifier value of around 111%. Increasing population happiness is an easy way to increase the output of all your production buildings."

The output of power plants are not affected by happiness.

In this category, it shows your country's happiness, the happiness change and the Happy Modifier. Underneath, it lists every factor and how much it contributes to your happiness change. The factors are Tax Rate, Pollution, Public Health, Hunger, Tourism, Unemployment, Worker Efficiency, War in Borders, Homelessness and Crime Rate.

Formulas
Happiness is used in many different ways. Here are some prominent examples:

Tax Rate
When changing your tax rate, your happiness will change by the stated amount. It will change each time you tax your country as well. The amount of happiness changed by the tax rate is determined by this formula: Amount = -((4(Tax Rate x 10.5) / 100)

For example, if my tax rate was 20% (0.20), my happiness change would be -((4(0.20*10.5)/100), which is equal to -0.084, which is how much my happiness will change by. (negative means decrease, positive means increase).

Worker Efficiency
Worker Efficiency Change = -((4(0.95 - happiness) / 10)

Unemployment
Happiness Change Amount = -((4(0.05Unemployment Rate) / 10)

Crime Rate
If there is more protection than needed, then happiness will always increase by 0.01. Otherwise, this formula is used: Happiness Change Amount = -(Required Protection / Protection / 10)

Tourism
Tourism is calculated different than the other formulas, and is different for each tourism building.

1.2(museums) + 6.85(national parks) + 0.15(monuments) + 3.85(theme parks)

That sum is then divided by the population of the country and added to your happiness. There is a maximum increase of 0.03 happiness.

War in Borders
War in Borders refers to the number of times your country has been attacked. Each time your nation is attacked, you will gain two points of this effect, which will go down by one each update. The formula to find the happiness affect is 0.02 - (War In Borders / 2) * 0.01).

Homelessness
According to the website,

"When your current population is greater than your maximum population, the excess population is classified as Homeless. This will have a negative effect on your population happiness modifier. This is the formula for the population modifier for homelessness:

Default Rate = -0.025

Homeless = current population – maximum population. (If less than zero, then it is reset to zero.)

If both the population and homeless amounts are above zero, then we use this formula instead of the default rate.

Rate = homeless / population

Mod = -((8 * Rate) / 10)"

Land
Land is used to build and is very important. There are two types of land, Owned and Bonus land. Each country starts with 300 owned land. Bonus land is earned through updates and completing quests. Bonus land is special because it cannot be captured, and does not count towards land costs. Open land is how much land that is available for development. Owned land can be bought underneath the land tab. The cost will increase depending on how much owned land you already have.

Under the land tab, it shows total land, owned land, bonus land and open land. It also has a drop-down menu that allows you to buy up to 16 units of land at a time, and shows you the cost as well. It also lists how much money you have underneath. Then, it shows a list of each type of building and how much land it uses up. These are houses, barracks, war factories, naval yards, airports, silos, warehouses, banks, lumberyards, mines, farms, oil rigs, refineries, fuel factories, ammo factories, universities, police stations, power plants, tech labs, theme parks, national parks, museums and monuments. It also shows the same data in a bar graph.