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Thanks for sharing this alternative to the Drake equation. 
Sheng Ho's profile photoTed Driver's profile photoTaweechai Maklay's profile photoTom Nathe's profile photo
The major weakness with the Seager equation is that the planets have to be transiting - to our field of view. There is no accounting for non-transiting  systems, i.e. stellar wobble from gravitational tugging by a large planet.
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