By Jameson Quinn: [Originally left as a comment.] So, Bruce Schneier and I are working on an academic paper about the E Pluribus Hugo (EPH) proposed voting system. We’ve been given a data set of anonymized votes from 2015. I don’t want to give all the results away but here are a few, now that people are actually voting for this year’s Hugos:
- A typical category had around 300 ballots which voted for more puppies than non-puppies, and about half of those ballots were for puppies exclusively. There were few ballots which voted for half or fewer puppies (typically only a few dozen). The average number of works per ballot per category was around 3.
- There were some weak correlations among non-puppies, but nothing that remotely rivals the puppies’ coherence. In particular, correlations were low enough that even if voting patterns remained basically dispersed, raising the average works per ballot per category from 3 to 4 (33% more votes total) would probably have been as powerful in terms of promoting diverse finalists (that is, not all puppies) as adding over 25% more voters. In other words: if you want things you vote for to be finalists, vote for more things — vote for all the things you think may be worthy.
- EPH would have resulted in 10 more non-puppy finalists overall; at least 1 non-puppy in each category (before accounting for eligibility and withdrawals).
- SDV(*) would have resulted in 13 more non-puppy finalists overall.
- Most other proportional systems would probably have resulted in 13 or 14 more.
- The above numbers are based on assuming the same ballot set; that is, that voters would not have reacted to the different voting system by strategizing. If strategizing is not used unless it is likely to be rational, that is a pretty safe assumption with EPH; less so with other proportional systems. Thus, other systems could in theory actually lead to fewer non-puppy nominees / less diversity than EPH.
Feel free to promote this to a front page post if you want. Disclaimer: EPH is not intended to shut the puppies out, but merely to help ensure that the diversity of the nominees better reflects the diversity of taste of the voters.
(*) Editor’s note: I believe SDV refers to Single Divisible Vote.
Update 02/08/2016: Added to end of second bullet missing phrase, supplied by author. Corrected footnote, based on author’s comment.