Tasmania’s House of Assembly election in 1982 had no party campaigns, no TV or newspaper ads, no how to vote cards and all candidates could only solicit votes for themselves, not for others in their party or anyone else.
A late legal opinion was that any form of expenditure on co-ordinated campaigning and joint solicitation of votes would be added to each individual candidate spending limits of $1000 separately.
With no party campaigns, no TV or newspaper ads, no how to vote cards and all candidates could only solicited votes for themselves, the date of the election slipped my mind and I forgot to get a postal vote before going inter-state for a holiday.
The Liberal Party won in a landslide defeating the incumbent Labor Government.
The campaigning ban seemed to give an advantage to the party already leading because the party on the nose could not dig itself out of a hole in the campaign by pointing out that they may be bad, but, on closer inspection, the other side is worse.
I do not know of any studies of this unusual election.