MEDSL data is missing State House candidate Mary Middleton, State Senate candidates Art Robinson and Jerry Allen, US House candidate Peter DeFazio. Harvard data matches Baltz et al exactly, except for several undervotes that are a few votes off. Baltz et al matches official returns.
If the exact accuracy of undervotes is not important, the recommendation is to use Harvard data.
MEDSL data is missing State House candidate Mary Middleton, State Senate candidates Art Robinson and Jerry Allen, US House candidate Peter DeFazio. Harvard data matches Baltz et al exactly, except for several undervotes that are a few votes off. Baltz et al matches official returns.
If the exact accuracy of undervotes is not important, the recommendation is to use Harvard data.