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 ...

A new nonparametric estimate of a convex regression function is proposed and its stochastic properties are studied. The method starts with an unconstrained estimate of the derivative of the regression ...

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 ...