# Politicians’ email communication with voters: A field experiment for the 2021 Bundestag elections

**Authors:** Ekkehard A. Köhler, Marius D. May

PMC · DOI: 10.1371/journal.pone.0324542 · PLOS One · 2025-07-22

## TL;DR

This study explores how politicians respond to emails from first-time voters with differing views on migration, using a field experiment during the 2021 German Bundestag elections.

## Contribution

The paper introduces a novel theoretical framework combining single-policy task model and costly persuasion to analyze political response behavior.

## Key findings

- Both partisanship and opportunism influence candidates' response behavior to voter emails.
- Candidates put in more effort when disagreeing with a voter's stance compared to when they agree.

## Abstract

First-time voters hold polarized views on migrant issues. Few is known about how politicians react to this peculiar phenomenon in democracies. This paper studies whether rational behavior drives political elites’ response behavior in a RCT email responsiveness study. We contacted 1554 candidates for the German Bundestag shortly before the 2021 election and asked about their stance on dual citizenship. We went into the field as first-time voting high-school students and varied their stances on dual citizenship, migration backgrounds and genders. Introducing a theoretical framework based on the single-policy task model and supplementing it with costly persuasion, we are able to disentangle and test for partisanship and opportunism. Our main results are as follows: First, both partisanship and opportunism explain the candidates’ response behavior. Second, candidates exert more effort if they disagree with a voter than if they agree with a voter.

## Full-text entities

- **Diseases:** discrimination (MESH:D010468)
- **Chemicals:** NA.III (-)
- **Species:** Homo sapiens (human, species) [taxon 9606]

## Full text

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## Figures

4 figures with captions in the complete paper: https://tomesphere.com/paper/PMC12282911/full.md

## References

42 references — full list in the complete paper: https://tomesphere.com/paper/PMC12282911/full.md

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Source: https://tomesphere.com/paper/PMC12282911