Using quarterly data for 56 new ethical-drug products launched between 1989 and 1996, we estimate the coefficients of a regression equation that has cumulative future sales beyond the forecast period as its dependent variable and third-quarter sales, post-launch product improvements and...

Supply security and environmental concerns associated with oil call for an introduction of hydrogen as a transport fuel. To date, scenario studies of infrastructure build up and sales of fuel cell vehicles (FCVs) are driven by cost estimates and technological feasibility assumptions, indicating...

Parameters for the birth and death diffusion life table model subject to downward jumps randomly occurring at a constant rate are estimated. The jump magnitudes have a beta distribution with support [0, lx], where lx is the total number of survivors prior to the jump. The estimation method is...

A model for economic behavior, under heterogeneous spatial economic conditions is developed. The role of selection pressure in a Bak–Sneppen-like dynamics with entity diffusion on a lattice is studied by Monte-Carlo simulation taking into account business rule(s), like enterprise–enterprise...

Physical modeling the dynamics of network growth help in the understanding of statistical properties of real networks. We describe here a statistical model supported on the random walk theory that generates several statistical connectivity properties observed in real networks. This formalism...

This paper determines first-passage time distributions with a twofold emphasis on the dynamics of the state variables and interest rate uncertainty. Underlyings follow two-dimensional geometric Brownian motions, Ornstein-Uhlenbeck processes or Poisson jump-diffusion processes, and boundaries are...