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Michael_S comments on Vote Pairing is a Cost-Effective Political Intervention - Effective Altruism Forum

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Comment author: Michael_S 26 February 2017 03:20:06PM 6 points [-]

Thanks for the write up. I think you make a compelling case that this is more effective than canvassing, which can be over 1000 dollars for votes at the margin in a competitive election like 2016. I do think there are a few ways your estimate may be an overestimate though.

Of those who claimed they would follow through with vote trading, some may not have. You mention that there wouldn't have been much value to defecting. However, much of the value of a vote for individual comes from tribal loyalties rather than affecting the outcome. That's why turnout is higher in safe presidential states in a presidential election than midterm elections, even when the midterm election is competitive. Some individuals may still have defected because of this.

Secondly, many of the 3rd party folks who made the trade could have voted for Clinton anyway. People who sign up for these sites are necessarily strategic thinkers. If they wanted more total votes for Stein/Johnson, but recognized that a vote for Clinton was more important in a swing state, they might have signed up for the site to gain the Stein/Johnson voter, but planned to vote for Clinton even if they didn't get a match. Additionally, even if they were acting in good faith when they signed up, they may have changed their mind as the election approached. 3rd parties are historically over estimated in polling compared to the election results, and 2016 was no exception: http://www.realclearpolitics.com/epolls/2016/president/us/general_election_trump_vs_clinton_vs_johnson_vs_stein-5952.html.

I don't think these problems are enough to reduce the value by an order of magnitude, but it is worth keeping in mind.

Additionally, while vote trading may be high EV now, I am skeptical that it is easy to scale. It's even more difficult to apply outside of presidential elections, so, unlike other potential political interventions, it will mostly be confined to every 4 years in one race. Furthermore, the individuals who signed up now may be lower cost to acquire than additional potential third party traders. They are likely substantially more strategic than the full population of 3rd party voters; in many years, the full population isn't that large to begin with. The cost per additional vote may be larger than your current estimates.

Nevertheless, I agree that right now it's probably more valuable than traditional canvassing and I'm glad people are putting resources into it.

Comment author: Ben_West  (EA Profile) 27 February 2017 02:56:37PM *  2 points [-]

Yeah, those are fair points. I would say that some EA's seem to over-estimate the amount of time people put into choosing a candidate. There are probably a few people who are calculating the Nash equilibrium and deciding to defect after agreeing to trade, but most people just do the honest thing because they are honest.