  Teens make life-changing decisions while constrained by the needs and
resources of the households they grow up in. Household behavior models
frequently delegate decision-making to the teen or their parents, ignoring
joint decision-making in the household. I show that teens and parents allocate
time and income jointly by using data from the Costa Rican Encuesta Nacional de
Hogares from 2011 to 2019 and a conditional cash transfer program. First, I
present gender differences in household responses to the transfer using a
marginal treatment effect framework. Second, I explain how the gender gap from
the results is due to the bargaining process between parents and teens. I
propose a collective household model and show that sons bargain cooperatively
with their parents while daughters do not. This result implies that sons have a
higher opportunity cost of attending school than daughters. Public policy
targeting teens must account for this gender disparity to be effective.
