Research & technology

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This page describes how technology and research works in the game. If you want tips or advice, check out the Technology guide.

Technology Interface

Technology Interface

If you click the Technology tab on the top bar you will open up the Technology interface. At the top left of the Technology Interface you can see your Research Administration type (commonly known as tech school) and what bonuses/penalties it is giving you. Next to that, on the top right is the technology you are currently researching, if any.

The bulk of the window is taken up by the technologies. There are a total of 150 technologies in the game, divided into 5 major categories. Each major category is further divided into 5 subcategories (with 6 technologies each). There is a progress bar underneath each major tech category that indicates how many technologies in that category you have already researched.

You can only research each subcategory linearly, from least advanced to most advanced. Each technology requires a number of Research Points to complete. These are added each day, according to your current Research Points (see bellow) until the technology is fully researched. If you click on a technology the bottom right panel will explain what the technology is and how it may help you (including the inventions it will unlock). At the bottom left there is a panel that shows the possible inventions that your technologies have unlocked, but which haven't triggered yet.

Technologies are also color-coded. Green techs have already been researched. Yellow techs are available to be researched. Grey techs cannot be researched yet. Blue tech is the one being researched at the moment.

Research Administration

Main article: Tech school
A country's Research Administration (tech school) determines what bonuses and penalties it gets to the Research Point cost of researching different tech categories.

Technology Categories

There are five major technology categories, each containing five subcategories:

Army technology Naval technology Commerce technology Culture technology Industrial technology
Army Doctrine Naval Doctrine Financial Institutions Aesthetics Power
Light Armament Ship Construction Monetary System Philosophy Mechanization
Heavy Armament Naval Engineering Economic Thought and Critique Social Thought Metallurgy
Military Science Naval Science Market Functionality Political Thought Infrastructure
Army Leadership Naval Leadership Organization Psychology Chemistry and Electricity

Inventions

As you research new technologies, they will open up possible inventions which can add still more effects to your country's advantages in combat, economics etc. When you click on a specific technology in the technology interface, you can see all the inventions it unlocks in the bottom right corner. Once you have researched the technology there is a small chance each month that one of the inventions it unlocked will trigger. All the inventions that your technologies have unlocked but which haven't triggered yet can be found in the "possible inventions" panel at the bottom left corner of the Technology Interface. This will show you the inventions names as well as the percentage chance that they will trigger each month. You can often affect the chance by researching other technologies. Hover the mouse over the inventions' percentage number and the tooltip will show the base chance as well as how to increase/decrease it.

Research Points

The country's daily Research Points(RP) are calculated with the following formula:

Research Points = (literacy points + clergy points + clerk points + national rank points) * (1 + plurality multiplier + techs + events + difficulty multiplier)

Literacy

The amount of research points from literacy is 4 * literacy% with a maximum of 4 RP with 100% literacy. Only the literacy of pops living in full states (not colonies or protectorates) is considered.

Clergymen

The amount of research points from clergymen is 1.5 * clergy% with a maximum of 3 RP if 2% of the population are clergymen.

Clerks

The amount of research points from clerks is 0.5 * clerks% with a maximum of 2 RP if 4% of the population are clerks. Before encouraging clerks for research, bear in mind that a pop must have at least 50% literacy to promote to clerks.

National Rank

The country's national rank gives it research points as follows:

  • Great Power: 1.5 RP
  • Secondary Power: 1.25 RP
  • Civilized: 1 RP
  • Uncivilized: none

Literacy, clergy, clerks and national rank form the base daily research point gain with a maximum of 10.5 RP for a great power with 100% literacy, 2% clergy and 4% clerks. To get the true daily research points, this base is then multiplied by the following modifiers:

Plurality

The plurality multiplier is 0.02 * plurality% with a maximum multiplier of 2 at 100% plurality.

Technology

The technologies in the Philosophy subcategory (under Culture technology) each give a multiplier with the first three techs giving a multiplier of 0.5 each while the last three techs give a multiplier of 1 each for a total multiplier of 4.5 with all six of the technologies.

Events

Some nations can gain research modifiers through events, like the the Swedish Folk School decision or discriminatory schools event.

Difficulty

The game's difficulty level will also provide a research modifier:

  • 0.5 on very easy
  • 0.25 on easy

Furthermore the AI countries will get modifiers on higher difficulties:

  • 0.5 on hard
  • 1 on very hard

Thus the total maximum daily research points (without events and on normal or higher difficulty) is: 10.5 * (1 + 2 + 4.5) = 78.75 RP.

Stockpiling

If no research goal is selected then it will be stockpiled up to a year's worth of RP. The amount currently stockpiled can be viewed by hovering the mouse over the RP number in the top panel. The pool is spent at a rate of 100/day once a technology is selected to research, and civilized nations can stockpile up to one year's worth of research. Stockpiled RP are also used by uncivilized nations for westernization. Uncivs can also gain large amounts of RP stockpile through conquest (and may stockpile up to 25000 RP).

In vanilla RP has no limit and is spent at a rate of 1000/day.