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Topics - somnicule

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Advanced / Computing via price-shifting vs. share-trading
« on: June 25, 2014, 07:13:34 am »
There are two equivalent methods for LMSR markets. One seems to be favoured by Hanson where users set probability distributions and pay for these changes according to the worst-case difference in their  log score and the previous bet's. Alternatively, there's a buying and selling of shares interface, which is closer to the usual perception of market makers. I'm wondering if you all have any thoughts on the relative benefits of each, in terms of costs and the usability in tandem with SIB.

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I've reached a point in developing an Ethereum version of the votecoin system where I'm trying to figure out how to appropriately reward voters for participation. The problem I'm facing is that the ballot and redistribution component only has access to the votecoin addresses and balances for those who voted, making it difficult to penalise non-voters. I could refactor the system such that the ballot can query the full list of addresses, but that seems unnecessarily expensive.

The alternative is to increase the money supply by 1/9th each round, so the relative power of non-voters is reduced by 10%. It seems to work, but I'd appreciate any thoughts on this. Thanks.

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Design / Incentives / Game Theory / Re: Branching
« on: June 07, 2014, 04:17:12 am »
Does anyone have thoughts on fixed ballot sizes vs. fixed ballot intervals?

So in a fixed ballot size, a ballot is created whenever, say, 30 decisions mature.

Off the top of my head, some benefits would be:
  • Always a sufficient number of decisions in a ballot to limit perverse incentives
  • Never an unmanageably large number of decisions in a ballot

And potential downsides:
  • Uncertainty regarding ballot dates
  • Problems with appropriate weighting of coin redistribution
  • Exploitation via. creating decisions to make collusion for 51% attacks easier

I'm not sure if those benefits outweigh the downsides.

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