The association between an adolescent's own behavior and that of his or her peers remains a key empirical finding in the study of delinquency, and this similarity is often explained in criminology by invoking processes of social influence and homophily. Adolescence is a period of rapid change for both individuals and their surroundings, however, and influence and homophily are often discussed without attending to their development over time. In the current study, I employ longitudinal social network models to estimate social influence and homophily related to alcohol and cigarette use and to determine whether there is change in the strength of these processes. Furthermore, I test whether the broader social environment conditions these processes and their observed changes. The results from this study indicate that although influence from peers decreases from early to mid‐adolescence, homophily on drinking and smoking increases. There is also evidence that school‐level opportunities and expectations affect social influence and homophily but do not account for the average changes observed in these processes.

中文翻译：

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同行之间的相似之处：影响力和选择的发展趋势*

青少年犯罪行为与青少年自身行为之间的关联仍然是犯罪研究中的关键经验发现，在犯罪学中，这种相似性通常通过社会影响力和同质性的过程来解释。青春期对个人及其周围环境都是一个快速变化的时期，然而，人们经常讨论影响力和同质性，而不关注其随着时间的发展。在当前的研究中，我采用纵向社交网络模型来估计与酒精和香烟使用相关的社会影响力和同质性，并确定这些过程的强度是否发生变化。此外，我测试了更广泛的社会环境是否会影响这些过程及其观察到的变化。这项研究的结果表明，尽管同龄人的影响从青春期的早期到中期下降，但饮酒和吸烟的同质性却增加了。也有证据表明，学校机会和期望会影响社会影响力和同质性，但不能解释这些过程中观察到的平均变化。