James Q. Wilson, perhaps the nation's most influential criminologist (though he'd hate that label...), is guest blogging on Vololkh conspiracy this week.
Here's a wonderfully concise summary of his thinking about crime (and about blogging. Hint: He doesn't think much of the latter. Warning: you have to scroll down to find his post.). UCLA prof Mark Kleiman has some characteristically sharp comments.
Readers with $5 to spare should also take a look at this recent NBER working paper, "What Do Economists Know About Crime?"