Economists frequently confine themselves to the qualitative analysis of continuous optimization problems or they restrict their quantitative analysis to inaccurate methods like linearization around the steady state. The fact that the solution is characterized by an inherently unstable adjustment...

Quantitative aspects of adjustment processes in economic growth remain frequently unsolved or are tackled with bulky or inaccurate methods like multiple shooting or log-linearization. Mulligan's (1991) method of time elimination, however, has improved the analysis of saddle path dynamics in...

Human capital accumulation is introduced in a growth model with R\&D-driven expansion in variety and quality of intermediate goods andknowledge spillovers from both research activities. Economic growth is no longer uniquely tied to population growth as previous growth models without scale...