I wouldn’t update too strongly on this single comparison, and I don’t know if there are better analyses of spillover effects for different kinds of interventions, but it seems that there are reasons to believe that spillover effects from cash transfers are relatively greater than for other interventions.
Don’t know if this is useful, but years ago HLI tried to estimate spillover effects from therapy in Happiness for the whole household: accounting for household spillovers when comparing the cost-effectiveness of psychotherapy to cash transfers, and already found that spillover effects were likely significantly higher for cash transfers compared to therapy.
In 2023 in Talking through depression: The cost-effectiveness of psychotherapy in LMICs, revised and expanded they estimated that the difference is even greater in favour of cash transfers. (after feedback like Why I don’t agree with HLI’s estimate of household spillovers from therapy and Assessment of Happier Lives Institute’s Cost-Effectiveness Analysis of StrongMinds)
I wouldn’t update too strongly on this single comparison, and I don’t know if there are better analyses of spillover effects for different kinds of interventions, but it seems that there are reasons to believe that spillover effects from cash transfers are relatively greater than for other interventions.