Operational Efficiency vs Clinical Safety, Care Appropriateness, Timeliness, and Access to Health Care 3.33
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Journal Of Productivity Analysis, vol. 53, 2020, p. 355-375.

Big and Beautiful? On Non-parametrically Measuring Scale Economies in Non-convex Technologies 5.0
Kristof de Witte, Rui Cunha Marques
Journal Of Productivity Analysis, vol. 35, 2011, p. 213-226.

Is Big Better? On Scale and Scope Economies in the Portuguese Water Sector 5.0
Rui Cunha Marques, Kristof de Witte
Economic Modelling, vol. 28, 2011, p. 1009-1016.