“…Understanding how large inefficiency are and where in the production process improvements could be made, is key for Governments Hakkinen 2009) (Papanicolas and Smith 2014) . Add refs Efficiency in healthcare has been analysed as the difference between the observed and optimal productivity mostly of providers, including hospitals, but also individual practitioners, primary healthcare units, clinics, nursing homes, public health teams and primary healthcare facilities (Hollingsworth and Wildman 2003, Hollingsworth 2008, Hollingsworth and Peacock 2008, Hussey, de Vries et al 2009, Kirigia, Sambo et al 2011, Au, Hollingsworth et al 2014. The efficiency of health systems has also been addressed, mostly at national level through cross-countries comparisons (Gravelle, Jacobs et al 2003, Hollingsworth and Wildman 2003, Greene 2004, Retzlaff-Roberts, Chang et al 2004, but also at sub-national level, by comparing states (Kathuria and Sankar 2005, Prachitha and Shanmugam 2012), districts (Kinfu 2013, Kinfu andSawhney 2015) or lower level health authorities (Giuffrida 1999, Giuffrida, Gravelle et al 2000, Giuffrida and Gravelle 2001, PuigJunoy and Ortún 2004, Varela, Martins et al 2010).…”