Commuter couples are a subset of dual-career couples who live apart in separate residences while both partners pursue careers. Gilbert and Rachlin address the difference between dual-earner families and dual-career families, distinguishing that dual-earner couples are those in which both spouses are earning for the family, but one or both of them consider their occupational involvement as a job. Jobs are unlike careers in that they do not require extensive training or commitment. In dual-earner couples, one spouse's work is generally considered secondary. Dual-career couples are families in which "both heads of household pursue careers and at the same time maintain a family life together". Both have high degrees of commitment to their careers, and neither partner's career is thought to be