Sociologists mostly treat age-at-arrival as a dichotomous variable whereas economists often approach it as a continuous variable. This article extends this debate by addressing a set of political behaviours that has mostly been the purview of political scientists. Analysing restricted, geocoded data from the National Survey of Latinos on Politics and Civic Participation, this article examines how age-at-arrival and civic institutions shape political participation among Latino immigrants. Logistic regression and random effects models suggest three key findings. First, age-atarrival has a strong impact on participation, with child arrivals showing the highest level of participation and midlife arrivals reporting the lowest level of participation. Second, there are no ethnic differences in the likelihood of participating in nonelectoral politics among Latinos. Third, involvements with civic institutions significantly shape political participation, confirming these institutions' potential role in cultivating political efficacy and participatory skills. At the same time, the impact of civic organisations on political participation is contingent on both the type of organisation and the immigrant's age-at-arrival, with ethnic organisations playing an important role in the political resocialisation process. Finally, ethnic concentration at the county has limited positive impact on political participation.
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