More realistic economics has to start out from the most basic socio-economic phenomena and processes, i.e. dilemma-prone interdependencies and strong uncertainty among agents that have become ubiquitous phenomena in the world today. In the reality of the “new” economy these are represented...

Is entrepreneurial talent entirely innate or do people learn to become entrepreneurs? We extend Lucas's (1978) model of entrepreneurship to allow for the possibility that entrepreneurial talents may be acquired by watching other entrepreneurs in action. This model implies that areas with a...

This paper aims at assessing the impact of R&D spillovers on firms’ economic performance as measured by productivity growth. The construction of R&D spillovers is based on Jaffe’s methodology (1986, 1988), which associates econometrics and data analysis. The main objective of the paper is to...

The present work briefly summarizes the results obtained in Palatella et al. Eur. Phys. J. B 38 (2004) 671 using the Diffusion Entropy technique and adds some new results regarding the Dow Jones Index time series. We show that time distances between peaks of volatility or activity are...