Appendix

Case Data #2 Data Dictionary: Bulldozer Blue Book

Case Study #4 Data Dictionary: Carvana

Case Data #2 Data Dictionary: Bulldozer Blue Book1

Variable

Description

SalesID

unique identifier of a particular sale of a machine at auction

MachineID

identifier for a particular machine;  machines may have multiple sales

ModelID

identifier for a unique machine model (i.e., fiModelDesc)

datasource

source of the sale record;  some sources are more diligent about reporting attributes of the machine than others. Note that a particular datasource may report on multiple auctioneerIDs.

auctioneerID

identifier of a particular auctioneer, i.e., company that sold the machine at auction. Not the same as datasource.

YearMade

year of manufacturer ...

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