[EM] Simulations with social welfare functions

2006-05-24 Thread Jobst Heitzig
Hello all, a week ago I suggested using social welfare functions (such as the Gini welfare function) to evaluate election methods. Now I did some simulations of the following kind: 1. Draw n (e.g. 1000) voter and c (e.g. 3) candidate positions from a d-dimensional (e.g. 2) standard normal

Re: [EM] Methods based on sequential voting

2006-05-24 Thread James Gilmour
Simmons, Forest Sent: Wednesday, May 24, 2006 3:33 AM In some elections not all of the ballots are cast at the same time, and furthermore, the partial results (from exit polls, say) may be available to voters later in the sequence. The simple, and logical, solution where an election spans

Re: [EM] Simulations with social welfare functions

2006-05-24 Thread bql
On Wed, 24 May 2006, Jobst Heitzig wrote: a week ago I suggested using social welfare functions (such as the Gini welfare function) to evaluate election methods. I have also been trying to run simulations that count up the social welfare, but my initial results caused me to doubt my

Re: [EM] Simulations with social welfare functions

2006-05-24 Thread bql
To answer my own question, I think the attached perl script nicely shows the difference between std-dev and gini by this output: data: 1, 2, 3, 4 std: 1.29099444873581 gini: 0.25 data: 1, 1, 1, 9 std: 4 gini: 0.5 data: 1, 1, 1, 999 std: 499 gini: 0.747005988023952 data: 1, 1, 1, 1, 1, 1, 1,