1. Boronenko, V., and Zeibote, Z. 2011. ‘The Potential of Cluster Development and the Role of Cluster Support Policies in Latvia’. Economic Annals 56 (191): 35–67. doi:10.2298/EKA1191035B.10.2298/EKA1191035
2. Caju, Ph. Du, Katay, G., Lamo, A., Nicolitsas, D., and Poelhekke, S. 2010. ‘Inter-Industry Wage Differentials in EU Countries: What Do Cross-Country Time Varying Data Add to the Picture?’ Journal of the European Economic Association 8 (2–3): 478–86. doi:10.1162/jeea.2010.8.2-3.478.10.1162/jeea.2010.8.2-3.478
3. Central Statistical Bureau of Latvia. 2017. Statistics Database. Retrieved from: http://www.csb.gov.lv/en/dati/statistics-database-30501.html
4. Clark, C. 1940. The Conditions of Economic Progress. 1st ed. London: Mcmillan.
5. Cross-sectoral Coordination Centre. 2013. ‘National Development Plan of Latvia for 2014–2020’. ‘Latvijas Vēstnesis’. http://www.pkc.gov.lv/sites/default/files/inline-files/NDP2020EnglishFinal__.pdf.