January 8, 2020 Study by Harvard researcher concludes Tezos-model PoS vulnerable to “selfish mining” attacks.

The study, “Selfish Behavior in the Tezos Proof-of-Stake Protocol”, proves how a miner (e.g a ‘baker’ in Tezos’ parlance) can be rationally incentivized to create a secondary invalid chain, by mining their own blocks and receive endorsements from other bakers not connected to the main chain. Commenting to CoinDesk on the paper, Tezos CSO Ryan Lackey wrote “It was a great research paper and we’d love to see more focus on economic and complex-system-interactions in cryptocurrency systems in academic and industrial research. Thanks to our governance model, it’s pretty easy to get [the fix] adopted.”