The study looked at how accurate people are when reporting their earnings in surveys. They found that most people report their earnings correctly, but some tend to over or underreport. Women and more educated people tend to report more accurately, while those with higher earnings are more likely to misreport. People who are agreeable are more accurate, while extraverted people tend to misreport. Women are less likely to overreport their earnings. The characteristics of the person asking the questions didn't have much of an impact on the accuracy of the responses.