Samaritan Syndrome: According to the Disease Control Priorities Project, for every three dollars I donate to help stop soil-transmitted helminthic infections, I will improve someone's life by one disability-adjusted life-year (DALY). If I spend five dollars to watch a movie rather than donating the money, the opportunity cost is one year and eight months of someone's life, not including time I could have been working. I am understandably frugal.
