I'm bias,

but BitShares DPOS (delegated proof of stake) economy of securing a blockchain was what determined its current design.

http://wiki.bitshares.org/index.php/DPOS_or_Delegated_Proof_of_Stake

edit:
Here's the discussion on the economy of DPOS (but the images has gone somewhere).
https://bitsharestalk.org/index.php?topic=5564.0