1. Aghion, P., Harris, C., Howitt, P., & Vickers, J. (2001). Competition, imitation and growth with step-by-step innovation. Review of Economic Studies, 68(3), 467–492.
2. Aghion, P., Bloom, N., Blundell, R., Griffith, R., & Howitt, P. (2005). Competition and innovation: An inverted-U relationship. Quarterly Journal of Economics, 120(2), 701–728.
3. Aghion, P., Blundell, R., Griffith, R., Howitt, P., & Prantl, S. (2009). The effects of entry on incumbent innovation and productivity. Review of Economics and Statistics, 91(1), 20–32.
4. Akaike, H. (1973). Information theory and an extension of the maximum likelihood principle. In B. N. Petrov & F. Csaki (Eds.), Second international symposium on information theory (pp. 267–281). Budapest: Akailseoniai–Kiudo.
5. Alesina, A., Spolaore, E., & Wacziarg, R. (2005). Trade, growth and the size of countries. Handbook of Economic Growth, 1(B), 1499–1542.