These actions reflect an income effect. After participating in the business training, women on average earn a higher income from their business. Husbands who are aware of the income increase try to “tax” some of this extra income for household purposes. In response, women try to hide part of their income, so that they can spend it privately.
This interpretation follows a former mathematical model which predicts these results, however the findings rest on assumptions as it is not possible to measure all interactions.
Purely experimental, the study was composed of a randomised control trial and field games. All results are based on the interconnection between the two experiments.
However, the sample is small, only 350 women chosen out of the larger sample. So it is not possible to isolate the specific mechanism that triggers income hiding, aspects such as taxation by the members of the household were not measured.