I came across a pretty phenomenal dataset the other day. I used the data for Georgia legislators to create the two visuals you see below. I highly recommend reading the associated paper, "The Ideological Mapping of American Legislatures." I've yet to discover an effectiveness score for state legislatures similar to the one produced on Congress by the
Most (and Least) Conservative Members of the Georgia General Assembly, 1993-2020
I love this research you found.
How can we get spreadsheet data on the other states?