The political influence of peer groups: experimental evidence in the classroom
通过自然实验，研究了同伴群体对个人政治认同的影响，发现同伴的政治参与度而非政治认同会影响个人政治立场，使其从极端转向中间。
People who belong to the same group often behave alike. Is this because people with similar preferences naturally associate with each other or because group dynamics cause individual preferences and/or the information that they have to converge? We address this question with a natural experiment. We find no evidence that peer political identification affects individual identification. But we do find that peer engagement affects political identification: a more politically engaged peer group encourages individual political affiliation to move from the extremes to the centre.