Impact of different criteria for identifying intra-household interactions: a case study of household time allocation

Studies of household activity time allocation patterns typically do not differentiate between joint and independent activities. For those that do, more often than not, they use a set of restrictive criteria for identifying joint activities. One consequence of using such criteria is that the occurrence of joint activities may be underestimated due to inconsistent reporting or ambiguities involved in many large-scale, activity-travel surveys. …