"...studies that surveyed whether respondents reported.." In other words, in these studies, they gave poor people money and then asked them what they spent it

"...studies that surveyed whether respondents reported.." In other words, in these studies, they gave poor people money and then asked them what they spent it on, with no objective monitoring. Is anybody surprised that the recipients did not report that they increased spending on alcohol or tobacco? This is a definition of "definitive data" with which I was previously unfamiliar.