On Finding the Proper Penal Sanctions

The verdict for drunk driver Afriani Susanti has been issued earlier this week: 15 years in prison for killing nine pedestrians in an infamous traffic accident. She was deemed guilty not of intentional murder, but of reckless and fatal driving. I won't discuss the verdict from legal perspective here. 15 years in prison is the maximum sanction she can get if she is deemed guilty of intentional murder. What I am more curious about is the way to find the proper penal sanctions for various criminal activities. In my January 2012 article about Afriani, I argued she must receive higher penalty — by categorizing her crime as an intentional murder — in order to reduce the incentives for other drivers to drive recklessly. At that time however, I did not think deeply about the most efficient sanction for her crime. I only followed standard Law and Economics doctrine that a sanction of multiple crimes should always be clearly differentiated with a single crime, simply be