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The Effect of Including an Opt-Out Option in Discrete Choice Experiments
- Jorien Veldwijk,
- Mattijs S. Lambooij,
- Esther W. de Bekker-Grob,
- Henriëtte A. Smit,
- G. Ardine de Wit
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- Published: November 3, 2014
- https://doi.org/10.1371/journal.pone.0111805