This dissertation reports work where physics methods are appliedto financial and economical problems. Some material in this thesisis based on $3$ published papers \cite{SY,SPY,income} which dividethis study into two parts. The first part studies stock marketdata (chapter 1 to 5). The second part...

Even simple, deterministic rules can generate interesting behavior in dynamical systems. This dissertation examines some real world systems for which fairly simple, locally defined rules yield useful or interesting properties in the system as a whole. In particular, we study routing in...

This paper argues that, for a prospective philosophical analysis of models and simulations to be successful, it must accommodate an account of mathematically rigorous results. Such rigorous results are best thought of as genuinely model-specific contributions, which can neither be deduced from...