Adu-Gyamfi, R., Kuada, J., and Asongu, A.S. (2022). An Integrative Framework for Formal and Informal Entrepreneurship Research in Africa, Journal of African Business https://doi.org/10.1080/15228916.2022.2042102
Ault JK and A Spicer (2020). The formal institutional context of informal entrepreneurship: A cross-national, configurational-based perspective. Research Policy, https://doi.org/10.1016/j.respol.2020.104160
Autio, E., and Fu, K. (2015). Economic and Political Institutions and Entry into Formal and Informal Entrepreneurship,Asia Pacific Journal of Management, 32, 67–94. https://link.springer.com/article/10.1007/s10490-014-9381-0
Bologna, J (2014). The effect of informal employment and corruption on income levels in Brazil. Available at: http://papers.ssrn.com/sol3/papers.cfm?abstract_id=2489057 (last accessed 6 June 2019). http://busecon.wvu.edu/phd_economics/pdf/14-26.pdf
De Beer, J, K Fu and S Wunsch-Vincent (2013). The Informal Economy, Innovation and Intellectual Property: concepts, metrics and policy considerations. Geneva: Economic Research Working Paper no. 10, World Intellectual Property Organization. https://www.wipo.int/publications/en/details.jsp?id=3954&plang=EN
De Castro, JO, S Khavul and GD Bruton (2014). Shades of grey: How do informal firms navigate between macro and meso institutional environments? Strategic Entrepreneurship Journal, 8(1), 75-94. https://onlinelibrary.wiley.com/doi/abs/10.1002/sej.1172
de Groot, J., Mohlakoana, N., Knox, A., Bressers, H. (2017). Fueling Women's Empowerment? An Exploration of the Linkages between Gender, Entrepreneurship, and Access to Energy in the Informal Food Sector, Energy Research and Social Science, 28, 86-97. https://doi.org/10.1016/j.erss.2017.04.004
Dibben, P, G Wood and CC Williams (2015). Toward and against formalization: Regulation and change in informal work in Mozambique. International Labour Review, 154(3), 373-92. https://core.ac.uk/download/pdf/74373378.pd
European Commission (2016). Decision (EU) 2016/344 of the European Parliament and of the Council of 9 March 2016 on establishing a European Platform to enhance cooperation in tackling undeclared work. Brussels: European Commission. https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A32016D0344
Evans, M, S Syrett and CC Williams (2006). Informal economic activities and deprived neighbourhoods. London: Department of Communities and Local Government. https://eprints.mdx.ac.uk/3760/
Jiyane, V.G., Mostert, J.B. (2008). The Role of the Public Library in Economic Empowerment and Poverty Alleviation among Informal Sector Women Entrepreneurs - A Preliminary Study in the Umhlatuze Municipality, Mousaion, 26(2)https://hdl.handle.net/10520/EJC78952
Ketchen, DJ, RD Ireland and JW Webb (2014). Towards a research agenda for the informal economy: A survey of the Strategic Entrepreneurship Journal’s Editorial Board, Strategic Entrepreneurship Journal, 8, 95–100. https://onlinelibrary.wiley.com/doi/abs/10.1002/sej.1175
Knox, A. J., Bressers, H., Mohlakoana, N., & De Groot, J. (2019). Aspirations to grow: when micro-and informal enterprises in the street food sector speak for themselves. Journal of Global Entrepreneurship Research, 9(1), 9-38. https://journal-jger.springeropen.com/articles/10.1186/s40497-019-0161-7
Kuk, G., Simba, A., & Giamporcaro, S. (2022). How paying–it–forward expands entrepreneurial functioning in Kenya’s informal settlements. Academy of Management Proceedings, 2022(1). https://journals.aom.org/doi/abs/10.5465/AMBPP.2022.165
Linares, LA (2018). The paradoxes of informalizing street trade in the Latin American city. International Journal of Sociology and Social Policy, 38(7-8), 651-672
Matos, S., & Hall, J. (2020). An exploratory study of entrepreneurs in impoverished communities: when institutional factors and individual characteristics result in non-productive entrepreneurship. Entrepreneurship & Regional Development, 32(1-2), 134-155. https://www.tandfonline.com/doi/full/10.1080/08985626.2019.1640476?src=recsys
Quak, E. and Barenboim, I. (2022) Female Entrepreneurship and Informality in Low- and Middle-Income Countries: What Have We Learned So Far?. MUVA Paper Series. Brighton: Institute of Development Studies. https://opendocs.ids.ac.uk/opendocs/handle/20.500.12413/17305
Rahou, E.H. And Taqi, A. (2021). The Conversion from Informality to a Formal Entity: Links to the Nature of the Owner-Manager. Journal of Developmental Entrepreneurship.Doi.Org/10.1142/S1084946721500278
Ram, M, P Edwards, T Jones and M Villaries-Varela (2017). From the informal economy to the meaning of informality: Developing theory on firms and their workers. International Journal of Sociology and Social Policy, 37(7/8), 361-73. https://eprints.soton.ac.uk/401786/
Thu, N. H., Duong, P. B., & Tho, N. H. 2020. Filling the voids left by the formal sector: informal borrowings by poor households in northern mountainous Vietnam. Agricultural Finance Review, 81(1): 94-113. https://ideas.repec.org/a/eme/afrpps/afr-12-2019-0134.html
Urbaeva, J., Jackson, T., & Park, D. 2018. Is Informal Financial Aid Good for Health? Evidence from Kyrgyzstan, a low-income post-socialist nation in Eurasia. Health & Social Work, 43(4): 226-234. https://pubmed.ncbi.nlm.nih.gov/30169692/
Webb, J. W., Tihanyi, L., Ireland, R. D., & Sirmon, D. G. (2009). You say illegal, I say legitimate: Entrepreneurship in the informal economy. Academy of Management Review, 34(3), 492-510. https://psycnet.apa.org/record/2009-10240-008
Webb, J.W., Khoury, T.K., & Hitt, M.A. 2019. The influence of formal and informal institutional voids on productive entrepreneurship. Entrepreneurship Theory and Practice, formally accepted. https://ideas.repec.org/a/sae/entthe/v44y2020i3p504-526.html
Webb, J.W., Ireland, R.D., & Ketchen, D.J. 2014. Toward a greater understanding of entrepreneurship and strategy in the informal economy. Strategic Entrepreneurship Journal, 8: 1-15. https://onlinelibrary.wiley.com/doi/full/10.1002/sej.1176
Williams, C.C. (2014). Explaining Cross-National Variations in the Commonality of Informal Sector Entrepreneurship: An Exploratory Analysis of 38 Emerging Economies, Journal of Small Business and Entrepreneurshiphttps://doi.org/10.1080/08276331.2015.1004959 27(2)
Williams, CC and AM Kedir (2018). Explaining cross-national variations in the prevalence of informal sector entrepreneurship: lessons from a survey of 142 countries. Journal of Developmental Entrepreneurship, 23(1), 1-22. https://www.worldscientific.com/doi/10.1142/S108494671850005X
Williams, CC and AV Horodnic (2019). Why is informal employment more common in some countries? An exploratory analysis of 112 countries, Employee Relations, 41 (6), 1434–1450. https://eprints.whiterose.ac.uk/140093/
Williams, CC and IA Horodnic (2015a). Are marginalised populations more likely to engage in undeclared work in the Nordic Countries? Sociological Research Online, 20 (3), 11. https://journals.sagepub.com/doi/10.5153/sro.3719
Williams, CC and M Shahid (2015). Informal entrepreneurship and institutional theory: explaining the varying degrees of (in)formalisation of entrepreneurs in Pakistan. Entrepreneurship and Regional Development, 28(1-2), 1-25. https://www.tandfonline.com/doi/full/10.1080/08985626.2014.963889
Williams, C.C. and Nadin, S. (2010). Entrepreneurship and the Informal Economy: An Overview. Journal of Developmental Entrepreneurship,Doi.Org/10.1142/S1084946710001683
Williams, CC and S Bezeredi (2018). Evaluating the impact of informal sector competition on firm performance: some lessons from South-East Europe. Journal of Developmental Entrepreneurship, 23(4), 1-14. https://www.worldscientific.com/doi/abs/10.1142/S1084946718500255
Williams, CC, A Martinez-Perez and A Kedir (2017b). Informal entrepreneurship in developing economies: The impacts of starting-up unregistered on firm performance. Entrepreneurship Theory and Practice, 41(5), 773-79. https://journals.sagepub.com/doi/abs/10.1111/etap.12238
Williams, CC, K Adom and I Horodnic (2020). Determinants of the level of informalization of enterprises: some evidence from Accra, Ghana. Journal of Developmental Entrepreneurship, 25(1), 1-24. https://www.worldscientific.com/doi/10.1142/S1084946720500041
Woodruff, C, S de Mel and D Mckenzie (2013). The demand for, and consequences of, formalization among informal firms in Sri Lanka. Applied Economics, 5(2), 122-150. https://www.aeaweb.org/articles?id=10.1257/app.5.2.122