In Defence Of Discrete Time Models — Brian Romanchuk

Not MMT per se but it has to do with economic modeling that is pertinent to MMT's stock-flow modeling. 

When looking at Steve Keens's claim about continuous and discrete yesterday, it seemed to me to be a bit off given that economic data is discrete despite the fact that it is reported in terms of flows that are assumed continuous. Brian explains the details of the modeling math clearly and briefly without getting overly wonkish. 

Bond Economics
In Defence Of Discrete Time Models
Brian Romanchuk