I'm also curious as to the type(s) of inequality the study aims to investigate such as Income, Gender, Wealth and the approach to be employed, whether it's inequality of opportunities or outcome.
Dear colleague, when we built our Integrated Inequali6y Database for SSA in 2016 we faced the choice of extending the Gini time series to 2013 but this entailed dropping a few countries with data till 2010-11. So, to avoid cutting the sample size (29 countries, representing over 90 % of SSA pop and GDP) we limited the analysis to 2011. Regards.
Okay. Now, I understand. It's commonplace to find missing data among SSA countries and I quite agree the challenges such will pose is enough justification to restrict the data points, as you have done.
Any by "Integrated Inequality Database", do you mean it consists of different facets of inequality? If yes, would you also be focusing on all?