As you can read in this statistics paper, in South Africa, the share of individuals attending school and the share of low-income women-led households is strongly correlated. Why?
This answers doesn't try to explain the result, but examines the processes one should go through when trying to interpret seemingly paradoxical correlations. This is because the reason for the association may not be known, so I can only look at how to investigate, not give "the answer".
Correlation isn't causation.
First this isn't a "paper", its more an R worksheet showing some charts. So it doesn't attempt to explain the association.
We need to look at what exactly is being measured. The variables are described as "Percentage listing present school attendance as: Yes" and a bit of digging finds it is the percentage of households and data is collected from each ward.
The other variable is "Percentage of women head households with income under R19.6k out of total number of households" again this is per ward. This is interesting, because it looks specifically at "women head households".
The study then finds a correlation between these variables.
Now, there are some immediate questions to ask:
- Does this mean that the households going to school are poorer?
No, that isn't what is measured. It says that in wards in which lots of households have children going to school there are a lot of relatively poor women headed households.
It is quite possible that such a correlation could occur because the same type of housing is attractive to both young families with children and poorer women-headed households.
*Are there confounding variables?
Several are possible: The age of people in the household, as most people tend to get richer with age, but have children at school when they are young. This might just be detecting the general tendency of older people to be more wealthy and not have school age children.
- Is the direction of possible causation clear?
I don't think so. Having school age children is correlated with having younger siblings. Young siblings require childcare and that can mean a mother not working. In a women-headed household, if the mother isn't working the effects on income are clear.
The cultural implication of "woman-headed household" needs to be investigated. What does this imply in a SA context?