What key words or journals should I look into if I want to read more about this? It's hard to filter out the noise machines blasting in every direction.
This non partisan group did detailed analysis of two elections, all of Colorado in 2014 and of Utah in 2016 looking at turnout and bias. https://voteathome.org/
If you want more academic work there’s quite a bit of it done by economics and political science profs. Just search for “mail vote bias”
Here’s the Brookline’s Institute, a pretty neutral bunch, on fraud: https://www.brookings.edu/blog/fixgov/2020/06/02/low-rates-o...
Some analysis from first principles on both fraud and bias: https://fivethirtyeight.com/features/there-is-no-evidence-th...
This non partisan group did detailed analysis of two elections, all of Colorado in 2014 and of Utah in 2016 looking at turnout and bias. https://voteathome.org/
If you want more academic work there’s quite a bit of it done by economics and political science profs. Just search for “mail vote bias”