In this work we provide a characterization of Ck,1 functions on Rn (that ik K times differentiable with locally Lipschitz k-th derivatives) by means of (k+1)-th divided differences and Riemann derivatives. In particular we prove that the class of Ck,1 functions is equivalent to the class of...

In this paper we deal with a Fritz John type constrained vector optimization problem. In spite that there are many concepts of solutions for an unconstrained vector optimization problem, we show the possibility “to double” the number of concepts when a constrained problem is considered. In...

For a Fritz John type vector optimization problem with C0,1 data we define different type of solutions, give their scalar characterizations applying the so called oriented distance, and give necessary and sufficient first order optimality conditions in terms of the Dini derivative. While...

In this paper we characterize nonsmooth convex vector functions by first and second order generalized derivatives. We also prove optimality conditions for convex vector problems involving nonsmooth data

Keynes in the General Theory, explains the monetary nature of the interest rate by means of the liquidity preference theory. The objective of this paper is twofold. First, to point out the limits of the liquidity preference theory. Second, to present an explanation of the monetary nature of the...

This study surveys theoretical models providing alternative rationales for corporate hedging.

This paper discusses identification within a new parametrization for I(2) systems, where the integral and proportional control cointegrating relations are not necessarily orthogonal. The new parametrization, while equivalent to previously proposed ones, gives more flexibility in choosing the...

In this paper we study the role of the eurozone’s institutional design in determining the sovereign debt crisis of the peripheral euro countries by means of a post-Keynesian eurozone center-periphery model Within this framework, three points are formally addressed. The incomplete nature of the...