Greed was calculated by comparing average incomes with the total number of inhabitants living beneath the poverty line. Envy was calculated using the total number of thefts – robbery, burglary, larceny and stolen cars. Wrath was calculated by comparing the total number of violent crimes – murder, assault and rape – reported to the FBI per capita. Lust was calculated by compiling the number of sexually transmitted diseases – HIV, AIDS, syphilis, chlamydia and gonorrhea – reported per capita. Gluttony was calculated by counting the number of fast food restaurants per capita. Sloth was calculated by comparing expenditures on arts, entertainment and recreation with the rate of employment. And pride, lastly, is most important. The root of all sins, in this study, is the aggregate of all data. Vought and his Kansas colleagues combined all data from the six other sins and averaged it into an overview of all evil.

Related article with more details. (I couldn’t find the original study "The Spatial Distribution of the Seven Deadly Sins within Nevada” from Kansas State University)