While drunk driving is an odious activity, a recent paper by Scott Adams et al., Seatbelt Use Among Drunk Drivers in Different Legislative Settings (or here), suggests that drunk drivers can be incented to buckle-up when driving.
The paper's hypothesis and research design are straight-forward. In states where local seatbelt laws are primarily enforced, law enforcement personnel can pull over a driver if he/she or a passenger is observed to be not wearing a seatbelt. The authors hypothesize that drunk drivers, to avoid such interaction with law enforcement, increase their compliance with seatbelt laws.
“We present evidence from the Fatality Analysis Reporting System and Behavioral Risk Factor Surveillance System that shows increased seatbelt use following the concurrent presence of stricter blood alcohol content thresholds and primarily enforced seat belt laws. This suggests that inebriated drivers may use their seat belts more judiciously to avoid being identified as a drunk driver by law enforcement. The interactive effect of stricter drunk driving laws and primary seatbelt laws are also shown to be more effective than either law passed in isolation in terms of reducing traffic fatalities.”