Consensus Research published it's first paper on Multibranch Forging
https://www.scribd.com/doc/248208963/Multibranch-forging (scroll down to view) and just open-sourced simulation tool behind!
https://github.com/ConsensusResearch/MultiBranch So you can play with multiple-branch forging and see it's model in action. For example, being implemented for just future predictions, multiple-branch forging == Transparent Forging. Being implemented for storing past & current blockchain state, it's also subject for Nothing-at-Stake concern. Our next paper will be about N@S, with concrete details, not just unclear statements, as previous studies. Then we will start to work on proposals to improve proof-of-stake at whole & concrete implementations.
This work is applied not to Nxt only, but all proof-of-stake cryptos.
Please support Consensus Research by providing feedback, spreading the word around, contributing to work, and donating.
We have own subforum on Nxt forum:
https://nxtforum.org/consensus-research