sample_predictive {elections.dtree}

Draw ballots from the posterior predictive distribution.

Description

sample_predictive draws ballots from a multinomial distribution with probabilities obtained from a single realization of the Dirichlet-tree posterior on the ranked ballots. See Everest et al. (2022) for details.

Usage

sample_predictive(dtree, n_ballots)

Arguments

dtree

A dirichlet_tree object.

n_ballots

An integer representing the number of ballots to draw.

Value

A prefio::preferences object containing n_ballots ballots drawn from a single realisation of the posterior Dirichlet-tree.

References

Everest F, Blom M, Stark PB, Stuckey PJ, Teague V, Vukcevic D (2023). “Ballot-Polling Audits of Instant-Runoff Voting Elections with a Dirichlet-Tree Model.” In Computer Security. ESORICS 2022 International Workshops, 525–540. ISBN 978-3-031-25460-4..

Everest F, Blom M, Stark PB, Stuckey PJ, Teague V, Vukcevic D (2022). “Auditing Ranked Voting Elections with Dirichlet-Tree Models: First Steps.” doi:10.15157/diss/021..