Why the poor? And is poor the correct label or is this just strongly correlated with the actual reason? In the past children were desirable as sources of additional income and for support at old age, is this still relevant? Otherwise it seems that you would want fewer children if you are poor because they obviously come with additional costs. Is it the cost of contraceptives or abortions instead of a deliberate choice? If it is not poverty directly but worse education because of poverty, how exactly would that work? How much education do you need to realize that additional children will cause additional costs? What other mechanisms are there? In the end it will probably be a mix of factors, but the phenomenon seems more complex than it looks like at first glance.
Why the poor? And is poor the correct label or is this just strongly correlated with the actual reason? In the past children were desirable as sources of additional income and for support at old age, is this still relevant? Otherwise it seems that you would want fewer children if you are poor because they obviously come with additional costs. Is it the cost of contraceptives or abortions instead of a deliberate choice? If it is not poverty directly but worse education because of poverty, how exactly would that work? How much education do you need to realize that additional children will cause additional costs? What other mechanisms are there? In the end it will probably be a mix of factors, but the phenomenon seems more complex than it looks like at first glance.