- Birdsall, N., F. Ferreira, L.F. López-Calva, and J. Rigolini. 2011. “The Middle Class in Developing Countries: Concept, Measurement and Recent Trends.” Unpublished paper, World Bank, Washington, D.C.

- Bosco, B. and A. Poggi. 2020. “Middle class, government effectiveness and poverty in the EU: A dynamic multilevel analysis.” _Review of Income and Wealth_ 66 (1): 94-125.

Burrows, M. 2015. “The Emerging Global Middle Class—So What?” _Washington Quarterly_ 38 (1): 7–22.

- Bussolo, M., M. E. Davalos, V. Peragine, and R. Sundaram 2018. _Toward a New Social Contract: Taking on Distributional Tensions in Europe and Central Asia._ World Bank, Washington, DC.

Castellani, F. and G. Parent. 2011. “Being ‘middle-class’ in Latin America.” OECD Development Center Working Paper 305, Paris, France.

Chaudhuri, S. 2003. “Assessing Vulnerability to Poverty: Concepts, Empirical Methods and Illustrative Examples.” Department of Economics, Columbia University, New York.

- Clementi, F., Molini, V., Schettino, F., Khan, H. A., and M. Fabiani. 2023. “Polarization and its discontents: Morocco before and after the Arab Spring.” _Journal of Economic Inequality_ vol 21: 105–129

- Cruces, G., L.F. López-Calva, and D. Battiston. 2010. “Down and Out or Up and In?” In _Search of Latin America‘s Elusive Middle Clas_ s, Inclusive Development Series 3, <mark>Bureau for Latin America and the Caribbean</mark> (RBLAC) and United Nations Development Programme (UNDP), New York.

- Dang, H.-A., and P. Lanjouw. 2017. “Welfare dynamics measurement: two defnitions of a vulnerability line and their empirical application.” _Review of Income and Wealth_ vol. 63: 633–660

- Dercon, S. 2001. “Assessing Vulnerability to Poverty.” Paper prepared for the Department for International Development, University of Oxford, Oxford.

- ———. 2006. “Vulnerability: A Micro Perspective.” QEH Working Paper, University of Oxford, Oxford.

Derndorfer, J., and S. Kranzinger. 2021. “The Decline of the Middle Class: New Evidence for Europe.” _Journal of Economic Issues_ 55 (4): 914-938.

- Desai, R.M., and H. Kharas. 2017. “Is a Growing Middle Class Good for the Poor?” In _Social Policy in a Time of Globalization._

- Doepke, M., and F. Zilibotti. 2007. “Occupational Choice and the Spirit of Capitalism.” CEPR Discussion Paper DP6405, Center for Economic Policy Research, Washington, DC.

Easterly, W. 2001. _The Middle Class Consensus and Economic Development_ . Washington, DC: World Bank.

- Elbers, C., and J. Gunning. 2003. “Vulnerability in a Stochastic Dynamic Model.” Discussion Paper 2003– 070/2, Tinbergen Institute, Rotterdam.

Esteban, J., Gradin, C. and D. Ray. 2007. “An Extension of a Measure of Polarization, with an application to the income distribution of five OECD countries.” _Journal of Economic Inequality_ , vol. 5: 1-19.

- Ferreira, F.H., J. Messina, J. Rigolini, L.F. López-Calva, M.A. Lugo, and R. Vakis. 2012. _Economic Mobility and the Rise of the Latin American Middle Class_ . World Bank, Washington, DC.

- <mark>Fukuyama, F. 2012. “The future of history: Can liberal democracy survive the decline of the middle class?”.</mark> _<mark>Foreign affairs</mark>_ <mark>, vol. 91 (1): 53-61.</mark>

Goldthorpe, J.H. 1987. _Social Mobility and Class Structure in Modern Britain_ . Oxford: Clarendon Press.

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