The report doesn’t explain what it is about size which makes it a relevant variable in explaining performance, nor does it account for why big is sometimes good (GP practices) and sometime not so good (care homes). It is the explanatory power of size that is the focus of research that we are currently undertaking at HSMC. We are testing whether micro care organisations employing five people or fewer outperform larger care providers in delivering services to users that are valued; innovative; personalised and cost-effective. The project is located in three case study sites and draws on interviews with 108 people who use services and carers, and with 20 people who run care organisations, spanning micro, small, medium and large scales.