1. we investigate a very popular cryptocurrency fork that resulted in the creation of Bitcoin Cash from Bitcoin. We are specifically interested in the introduction of Emergency Difficulty Adjustment (EDA) algorithm to the forked BCH chain. Since BTC and BCH shared the same difficulty algorithms, EDA was introduced to incentivize miners to process BCH's transactions over those of the more popular References Aguirregabiria V, Mira P (2007) Sequential estimation of dynamic discrete games;Econometrica