We consider a multiobjective optimization problem with a feasible set defined by inequality and equality constraints such that all functions are, at least, Dini differentiable (in some cases, Hadamard differentiable and sometimes, quasiconvex). Several constraint qualifications are given in such a way that generalize both the qualifications introduced by Maeda and the classical ones, when the f...

The low rate of employment among disabled people in Britain has often been observed, but is not well understood. This paper examines the dynamics of disabled people's employment, with a view to reaching a better understanding of the processes which underlie the cross-sectional picture. The analysis uses data from the first seven waves of the British Household Panel Survey and focuses on three t...

For an inequality system defined by an infinite family of proper convex functions, we introduce some new notions of constraint qualifications in terms of the epigraphs of the conjugates of these functions and study relationships between these new constraint qualifications and other wellknown constraint qualifications including the basic constraint qualification studied by Hiriart-Urrutty and Le...