  We consider how exchanges of support between parents and adult children vary
by demographic and socio-economic characteristics and examine evidence for
reciprocity in transfers and substitution between practical and financial
support. Using data from the UK Household Longitudinal Study 2011-19, repeated
measures of help given and received are analysed jointly using multivariate
random effects probit models. Exchanges are considered from both a child and
parent perspective. In the latter case, we propose a novel approach to account
for correlation between mother and father reports and develop an efficient MCMC
algorithm suitable for large datasets with multiple outcomes.
