Global mental health in high-income countries.

Over the past decade there have been significant efforts to scale-up mental health services in resource-poor countries. A number of cost-effective innovations have emerged as a result. At the same time, there is increasing concern in resource-rich countries about efficacy, efficiency and acceptability of mental health services. We consider two specific innovations used widely in low- and middle-income countries, task-sharing and a development model of mental healthcare, that we believe have the potential to address some of the current challenges facing mental health services in high-income countries. © The Royal College of Psychiatrists 2016.