In this article, we consider a model of multiple make-to-order suppliers, which compete based on their promised sojourn times. A fixed penalty is imposed on the suppliers for failing the promised delivery time requirement at an agreed service level. The demand is allocated to the suppliers...

Instrumental variable (IV) estimation methods that allow for certain nonlinear functions of the data as instruments are studied. The context of the discussion is the simple unit root model where certain advantages to the use of nonlinear instruments are revealed. In particular, certain classes...

Fisher's equation for the determination of the real rate of interest is studied from a fresh econometric perspective. Some new methods of data description for nonstationary time series are introduced. The methods provide a nonparametric mechanism for modelling the spatial densities of a time...