This paper presents the theoretical and applicative model elaborated by Harry Markowitz on the determination of the structure of the efficient securities portfolio. In this sense, in order to determine the structure of the efficient Markowitz portfolio (PE), a Lagrange function is built and...

Many technologies in energy, transportation, and telecommunications require large infrastructure systems to deliver benefits to adopters and society. Policymakers seeking to promote the diffusion of infrastructure-dependent technologies are often confronted with the ``chicken-and-egg" problem:...

This study illustrates how a manufacturer can use leadtime differentiation- selling the same product to different customers at different prices based on delivery leadtime- to simultaneously increase revenue and reduce capacity requirements. The manufacturer's production facility is modeled by...