Economics Professor Darren Grant has a new article in Social Science Quarterly, December 2024, titled “Prevailing Party Laws & General Election Outcomes.” It finds that the order of candidates influences voting behavior, and estimates that 2% of the voters are influenced by ballot order. Here is a link to a description of his paper.
He has written about ballot order before, including a 2017 article, “The Ballot Order Effect is Huge: Evidence from Texas.”