Elemental Forums
While conducting research the original old techs that were merged are still around. So far I have found economics (which is supposed to give you markets) and administration which is supposed to give you palaces, but they do not give you anything. 
(Which is good), but they are still there and can be researched for a blank tech. )
Whoops!
This might explain why I was able to do a research that supposedly unlocked 'Gardens', even though I had been building them earlier in the game.. heh
Yes, I researched "Harvesting", which I don't recall seeing in previous betas, and it supposedly unlocked gardens, but gardens were already available to be built.
Yeah, I really don't get these techs. Why do I need to research markets when I already have them?
Actually I think the R&D for gardens improves the food output of the gardens.
As for the old techs remaining perhaps they will add more buildings in their place. Because now that they limited most buildings to 1 copy it would be cool to see more buildings. Before there was no need as specializing a city simply meant you build a ton of one type of building their. Now that most buildings are limited to 1 cities tend to look alike since you have more space then you can fill.
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