The discrepancy could be explained by how tax benefits and welfare work between countries. In some countries it pays for a young family to pretend to be a singl

The discrepancy could be explained by how tax benefits and welfare work between countries. In some countries it pays for a young family to pretend to be a single-parent household to get welfare benefits. In others it is the exact opposite. Also depending on the financial situation it might change incentives. For example in many countries middle class people benefit more from marriage and benefits associated with it than lower class people.