The State of Victoria in Australia has released the full maths, parameterisation, assumptions behind its theoretical modelling that “informs” its decision making. Though not any of the computational scripts they used to do the calculations.

Summary at: https://www.dhhs.vic.gov.au/theoretical-modelling-inform-victorias-response-coronavirus-covid-19

Full description at: https://www.doherty.edu.au/uploads/content_doc/McVernon_Modelling_COVID-19_07Apr1_with_appendix.pdf