Bibor
Doomsday Machine
Academy (Great Scientist tile improvement) provides 5
.
Compared to a Trading Post it's mere +3 "stuff".
Or is it?
Trading post:
basic: 2
add marketiplace: 2.5
add bank: 3
add stock exchange: 3.66
Academy:
basic: 5
add National College: 7.5
add University: 10
(add Observatory: 12.5
)
(add Research lab: 20
)
In comparison to a pop 8 city (an good medieval city):
basic: 8
add Library: 12
add University: 18
(add Observatory: 24
)
***
Conclusion: If used with Babylon super-early, research gained from a well-placed single Academy is probably worth an extra decent city in terms of research. Future scientists are (probably) better used for bulbs.

Compared to a Trading Post it's mere +3 "stuff".
Or is it?
Trading post:
basic: 2

add marketiplace: 2.5

add bank: 3

add stock exchange: 3.66

Academy:
basic: 5

add National College: 7.5

add University: 10

(add Observatory: 12.5

(add Research lab: 20

In comparison to a pop 8 city (an good medieval city):
basic: 8

add Library: 12

add University: 18

(add Observatory: 24

***
Conclusion: If used with Babylon super-early, research gained from a well-placed single Academy is probably worth an extra decent city in terms of research. Future scientists are (probably) better used for bulbs.