Some European countries have devolved health care services to subnational units. This is
especially the case in unitary states that are organised as a national health service, where choice
is not ‘built into’ the health care system. We argue that there are different models of devolving
authority to subnational jurisdictions which have repercussions for regional health care
inequalities and the amount of policy interdependence across regions. We examine broad trends
in two institutional models of devolution: a ‘federacy model’, where only a few territories obtain
health care responsibilities (such as in the United Kingdom), and a ‘systems model’, where the
whole health system is devolved to a full set of subnational units (such as in Spain). This paper
briefly discusses the impact of these two models of devolution on the regional diversity of the
health system. Our findings suggest that a ‘systems model’ of decentralisation, unlike a
‘federacy model’, gives rise to significant policy interdependence. Another finding indicates
that geographical dispersion of health care activity is larger in the ‘federacy model’
