@other{https://resolver.caltech.edu/CaltechTHESIS:11202019-123647830,
    title = "A Microeconometric Analysis of Consumer Response to Direct Marketing and Mail Order",
    year = "1997",
    url = "https://resolver.caltech.edu/CaltechTHESIS:11202019-123647830",
    id = "record",
    doi = "10.7907/1x9m-x446"
}