Walter Briec, Kristiaan Kerstens, Philippe Vanden Eeckaut, Non-convex Technologies and Cost Functions: Definitions, Duality and Nonparametric Tests of Convexity, Journal of Economics, Vol. 81, No. 2 ...

C. Combari, A. Elhilali Alaoui, A. Levy, R. Poliquin, Convex Composite Functions in Banach Spaces and the Primal Lower-Nice Property, Proceedings of the American ...

Financial executive pay is a convex function of profits if recipients get a greater increment in pay when returns are high as opposed to moderate, compared with when returns are moderate as opposed to ...