1. Centre for Health Economics, University of York , Alcuin Block A, Heslington, York YO10 5DD, UK
2. Department of Economics and Related Studies, University of York , Heslington, York, YO10 5DD, UK
3. Department of Economics, University of Sierra Leone, Fourah Bay College , Mount Aureol, Freetown, Sierra Leone
4. Ministry of Health and Sanitation, Government of Sierra Leone , 4th & 5th Floor, Youyi Building, Brookfields, Freetown, Sierra Leone