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Ensor, Tim and So, Sovannarith and Witter, Sophie (2016) Exploring the influence of context and policy on health district productivity in Cambodia. Cost Effectiveness and Resource Allocation, 14 (1). ISSN 1478-7547
McPake, Barbara and Witter, Sophie and Ensor, Tim and Fustukian, Suzanne and Newlands, D and Martineau, T and Chirwa, Y (2013) Removing financial barriers to access reproductive, maternal and newborn health services: the challenges and policy implications for human resources for health. Human Resources for Health, 11. ISSN 1478-4491
Witter, Sophie and Jones, A and Ensor, Tim (2013) How to (or not to) . . . measure performance against the Abuja target for public health expenditure. Health policy and planning. pp. 1-6. ISSN 0268-1080
Chirwa, Y and Witter, Sophie and Munjoma, M and Mashange, W and Ensor, Tim and McPake, Barbara and Munyati, S (2013) The human resource implications of improving financial risk protection for mothers and newborns in Zimbabwe. BMC Health Services Research, 13. p. 197. ISSN 1472-6963
Witter, Sophie and Ensor, Tim (2012) Financing maternal health care services. In: Maternal and perinatal mortality in developing countries. CABI. ISBN 978-1845937454
McCoy, David and Bennett, Sara and Witter, Sophie and Pond, Bob and Baker, Brook and Gow, Jeff and Chand, Sudeep and Ensor, Tim and McPake, Barbara (2008) Salaries and incomes of health workers in sub-Saharan Africa. Lancet, 371 (9613). pp. 675-681. ISSN 0140-6736
Ensor, Tim and Witter, Sophie (2008) PROPOSED REVISIONS TO THE SDIP – STRENGTHENING A MAJOR NATIONAL INITIATIVE FOR SAFE MOTHERHOOD IN NEPAL. Working Paper. Options for DFID and MoHP, London.
Witter, Sophie and Ensor, Tim (2007) Evaluating a health financing policy change: framework and suggested approaches. Technical Report. Immpact, University of Aberdeen.
Ensor, Tim and Witter, Sophie (2007) Health Worker Incentives Survey (HWIS). Manual. Immpact, University of Aberdeen.
Ensor, Tim and Witter, Sophie (2001) Health economics in low income countries: adapting to the reality of the unofficial economy. Health Policy, 57 (1). pp. 1-13. ISSN 0168-8510
Witter, Sophie and Ensor, Tim and Thompson, Robin and Jowett, M (2000) Health Economics for Developing Countries. A Practical Guide. MacMillan Education, London. ISBN 0-333-75205-8.