Hrm it sounds as if the calculations of the research points per turn is complex indeed.
I became curious, so I went and took notes of all the techs I can research as of now. Since I am more or less the runaway civ in technology as of now, I'm rather sure there are a few techs that nobody has. I have ALL the prerequisites for these techs.
These are the classical era techs I can research.
- Aristocracy. Classical era. 3 prerequisites. Almost sure nobody has it. 1989 rp/turn
- Literature. Classical era. 3 prerequisites (but 2 needed only). Almost sure nobody has it. 2249 rp/turn
- Construction. Classical era. 2 prerequisites. Almost sure nobody has it. 1989 rp/turn
- Ship building. Classical era. 2 prerequisites. Almost sure nobody has it. 1989 rp/turn
- Road building. Classical era. 1 prerequisite. Almost sure nobody has it. 1989 rp/turn
- Athletics. Classical age. 1 prerequisite. Almost sure nobody has it. 1989 rp/turn
- Cloud patterns. Classical era. 1 prerequisite. Almost sure nobody has it. 1730 rp/turn
- Glass blowing. Classical era. 2 prerequisite. I know 4 civs on my continent alone have it. 2127 rp/turn
So from these results it seems to me that:
- Prerequisites number does not matter.
- The "standard" research rate is 1989 rp/turn
- Glass blowing is probably changed by the fact a lot of civ have it, and so I get more points (+6,93% in fact)
- Literature and cloud patterns change, but I do not know why. Literature gets 260 rp more (+13,07%), cloud patters -259 (-13,04%). Since these variations, in rp, are basically identical, I will assume they are in fact a result of the same formula, and there's a difference on 1 rp due to rounding most likely. This is VERY curious since I don't know what is changing the cost of these techs.
Now, the ancient era techs I still need.
- Folk dance. Ancient era. 2 prerequisites. At least one civ has it. 2024 rp/turn
- Folk music. Ancient era. 2 prerequisites. At least one civ has it. 2024 rp/turn
- Oratory. Ancient era. 2 prerequisites. Almost sure nobody has it. 1989 rp/turn
- Candle making. Ancient era. 1 prerequisite. Almost sure nobody has it. 1989 rp/turn
- Shinto. Ancient era. 1 prerequisite. Many civs have it. 1764 rp/turn
- Ngaaism. Ancient era. 1 prerequisite. Almost sure nobody has it. 1730 rp/turn
- Resurrection. Ancient era. 2 prerequisite. Almost sure nobody has it. 1989 rp/turn
- Sundial. Ancient era. 2 prerequisites. Almost sure nobody has it. 1989 rp/turn
- Karma. Ancient era. 2 prerequisites. Almost sure nobody has it. 1989 rp/turn
From this I gather that:
- Prerequisites number do not matter
- The "standard" research rate is 1989 rp/turn
- A couple of tech (Shinto and ngaaism) have 1730 (the same number as cloud patterns above), + 34 points for shinto due to many civs knowing it
- Folk dance and music have 2024, that is 35 rp more than the norm. This is pratically the same increase as shinto, which means an equal number of civs as for shinto know these 2 techs.
Now let us combine all these observations
- My standard research rate seems to be 1989 rp/turn
- The era of the tech does NOT matter as far as rp/turn is concerned. All tech no matter what the era gain 1989 rp/turn base, though maybe ALL the tech have slowed down once I reached classical era. I have no way to check this
- Prerequisites number does NOT matter
- There is one tech (literature) with a base rp/turn of 2249 (+13,07%), and three (cloud patterns, shinto, ngaaism) with a base rp/turn of 1730 (-13,04%). Due to the similar numbers, these most likely depends from the same formula. But I have no idea what the cause is.
- The techs which are known to other do get a slight rp gain. Shinto, Folk dance, Folk music gain 34 and 35. Glass blowing gains 138, supposedly because a lot more civs know it. Or maybe due to the era, glass blowing gets more points and it's the only one of the classical era. Or maybe due to something else, I don't know.
Hope this all will be of use for the powers that be
P.S.
About this
We know the civopedia needs further work. Nobody here really specializes in making sure the pedia is properly maintained but we could sure use a person who does!
Put an ad requesting someone out. You might be lucky, since it doesn't really require coding, just time... Wish I could help myself, but time is an issue.