Woodcoin also mentioned in this paper: 


https://arxiv.org/abs/2004.09212

 A System Dynamics Model of Bitcoin: Mining as an Efficient Market and the Possibility of "Peak Hash"

Authors: Davide Lasi, Lukas Saul

Abstract: The mining of bitcoin is modeled using system dynamics, showing that the past evolution of the network hash rate can be explained to a large extent by an efficient market hypothesis applied to the mining of blocks. The possibility of a decrease in the network hash rate from the next halving event (May 2020) is exposed, implying that the network may be close to 'peak hash', if the price of bitcoin… ▽ More

Submitted 20 April, 2020; originally announced April 2020.

Comments: 17 pages, 11 figures. For associated model, see: https://github.com/davidelasi/bitcoin