1. Abramovitz, M. (1956). Resource and output trends in the United States since 1870. In Resource and output trends in the United States since 1870 (pp. 1–23). NBER. Retrieved from http://www.nber.org/chapters/c5650.pdf
2. Acemoglu, D., Johnson, S., & Robinson, J. A. (2001). The colonial origins of comparative development: An empirical investigation. The American Economic Review, 91(5), 1369–1401.
3. Acharya, R. (2014). Canada, industry Canada, and economic research and policy analysis branch. ICT and total factor productivity growth: intangible capital or productive externalities? Retrieved from http://epe.lac-bac.gc.ca/100/201/301/weekly_checklist/2015/internet/w15-11-F-E.html/collections/collection_2015/ic/Iu172-1-2010-1-eng.pdf
4. Aghion, P., Boustan, L., Hoxby, C., & Vandenbussche, J. (2009). The causal impact of education on economic growth: Evidence from US. Unpublished paper. Retrieved from http://www.weareeducation.org/Harvard_Causal_Impact_Of_Education.pdf
5. Ahn, S. (2001). Firm dynamics and productivity growth: A review of micro evidence from OECD countries. Retrieved from https://doi.org/10.2139/ssrn.276669