What are the possible causes of the large disparity between official sources of crime statistics and the results of these other statistics projects?

Answer 1

Which other statistics projects?

Answer 2

comparing and contrasting the official sources of crime statistics with more unofficial sources: For example, compare the Uniform Crime Reports (UCR) data with self-report surveys or prisoner interviews.

Answer 3

Thanks for clarifying your question. Would you expect the data from self-report surveys or prisoner interviews to be accurate? Isn't it in people's self-interest to often shade the truth for such interviews and surveys?

Answer 4

I would say surveys

Answer 5

Both prisoner interviews and self-report surveys encourage shading the truth.