New York cops are engaged in an unofficial strike, sending the number of arrests plummeting. Is mayhem around the corner? Timothy Carney at the Washington Examiner argues that we overestimate the role of the police in preventing crime. I'd guess it depends on the neighborhood, how long the police have to withdraw enforcement before things go wild. For lots of people, the presence or absence of police has almost nothing to do with whether they're likely to steal or start shooting up the place. In other neighborhoods, it doesn't seem to take much to spur looting and drive-by shootings. I suspect we're about to collect a lot of interesting new data.