It`s: forums.civfanatics.com/resources/research-agreements-bnw.25568/#Costs reduction in research costs: Meeting CivsTreffen of other civilizations that have explored a technology you do not have, will reduce the cost of this technology. It`s a reasonable mechanic, as if you see someone using a new invention, it becomes easier to discover for yourself. The more you know about the Civs who have studied something, the lower the cost of this technology will be. As you move towards education and scientific theory, other Civs are likely to explore military technologies at the lower end of the tech tree. You will be able to catch up faster in military technology thanks to this one, so meeting Civs on scouting and later with Caravels to explore the world (or when creating the World Congress) is important for the pace of your research. Maybe it`s a matter of economics? In Civ 5, this would happen sometimes, but they would also ask for gold to charge the cost of the research agreement. But they don`t do it here and the cost of the research agreement has changed. So I was confused if it`s as expected, close right away, but it wasn`t what I expected. The money you invest in the agreement is lost. That`s not necessarily a bad thing – if you can go to war with someone, they`ll lose the money they could have used to defend themselves. Investments in research agreements are lost if they are broken. That`s why you should never go to war with your research partners if you can help him — because you lose both. As in previous versions, cities remain the central pillar of civilization gameplay.
A city can be based on a site desired by a unit of settlers manufactured in the same way as military units. The city will then increase in population; Production of units and buildings; And create research, wealth and culture.  The city will also expand its boundaries by one or more tiles at a time, which is essential for the claim of territory and resources. The expansion process is automated and adapted to the needs of the city, but the tiles can be purchased with gold.   While an academy at the beginning of the game is the obvious choice, later in the game, all the great scientists should be used to give you a technical boost. This is because if an academy approaches just before the end of the game, it cannot generate as much science over 100 rounds as a single use of the Great Scientist`s ability to discover the technology. Given the performance of Discover Technology is based on your latest edition of Science Civ (about 8 valuable rounds), it is obvious that using them at the beginning of the game is a big mess. Getting 200 science from them would be a joke if a city could get this in 7 rounds later in the game with an academy and all the buildings research boost. Under the best conditions (excluding civs, all the techs explored and all buildings of 4 – 50%) an academy will generate 36 searches per turn. Freedom`s New Deal Tenet allows you to get 16 sciences per academy or 48 per lap in the best conditions. Korea would get 54, due to the science 2 for all the improvements of The Great Tile Person. As in previous games, there are many ways to achieve victory.