Hearing the voice of future generations: A laboratory experiment of `Demeny voting`

Kamijo, Yoshio; Hizen, Yoichi; Saijo, Tatsuyoshi (2016). 'Hearing the voice of future generations: A laboratory experiment of `Demeny voting`' Paper presented at the annual conference of the HDCA, Tokyo 2016.


abstract
We report the first experimental evidence of the effect of the “Demeny voting” wherein some of the people (e.g., parents) have additional votes as the proxy of the future generation (e.g., their children). In our experiment, three participants are separated into the present and future generations, two of whom are in the present generation, and members in the present generation have to determine the resource allocation between present and future generations by the majority voting. We compare the voting behaviors and results under an ordinal majority voting (i.e., each of the two in the present generation has one vote) and under Demeny voting (i.e., one of the two has two votes while another has one vote). We obtain the mixed evidences about the effect of Demeny voting on the reflection of the interest of the future generation. A remarkable finding is that a half of the participants who voted in favor of the future generation under the ordinal voting reversed their decisions when they had one vote under Demeny voting, i.e., they voted in favor of the present generation. This finding tells us the necessity to care about the behaviors of not only the people who are given additional votes but also the people who have only one vote when we consider the introduction of Demeny voting. Finally, we compare the voting behavior between male and female subjects. We find that female subjects use an additional vote for future generation more frequently than male subjects do, implying that women unlikely abuse the proxy position, compared with men.

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