Consumer boycott campaigns against goods that are produced using child labor are becoming increasingly popular. Yet there is still no consensus on the effects of this type of activism on child labor in developing countries. In fact, if some agreement is to be found in the recent economic literature, it is that a boycott does not reduce child labor. We contribute to this discussion by presenting a simple model which shows that there are conditions under which a consumer boycott reduces child labor. We consider a small country two-factor economy populated by heterogeneous households. The boycott affects both the adult and the child labor markets. We show that the effects are heterogeneous and depends on household characteristics and on the income distribution. We derive the conditions under which the consumer boycott reduces child labor not only for non-poor households but also for some of the households whose income is -before the boycott -below the subsistence level.Keywords: Consumer product boycott, child labor, household heterogeneity, income distribution.JEL Classification: J13, C35 * Department of Economic Studies, University of Naples Parthenope (Italy) and HiCN. E-mail: michele.dimaio@uniparthenope.it.† Corresponding author. Department of Economic Studies, University of Naples Parthenope (Italy.) E-mail: giorgio.fabbri@uniparthenope.it. We would like to thank two anonymous Referees, the Editor of this Journal, Carmen Camacho, Matthias Doepke, Eric Edmonds and Vincenzo Lombardo for comments and suggestions. All errors are of course our own responsibility.