1. Aghion, P., Howitt, P., 1998. Endogenous Growth Theory. MIT Press, Cambridge, MA.
2. Barro, R.J., Sala i-Martin, X. 1995. Economic Growth. McGraw-Hill, London.
3. Battisti, G., 2000. The Intra-Firm Diffusion of New Technologies. Ph.D. Thesis, University of Warwick, mimeo.
4. Battisti, G., Stoneman, P., 2001. The Intra-Firm Diffusion of New Process Technologies. University of Warwick, mimeo.
5. Firm size and the adoption of flexible automation;Cainarca;Small Business Economics,1990