Fabrizi and Trivisano (2007) suggested a method for determining stratum boundaries when multiple stratification
variables are available along with prior-survey response data.
Consequently, rather than positing two distinct strata, a more plausible model would be one of increasing transformation with multiple stratification
, each building on the previous.
Using the comprehensive Wines & Vines database of all 7,400+ wineries across the United States, the ShipCompliant transactions are the basis to project shipments from all United States wineries using multiple stratifications
including location of winery, annual production of winery and destination of shipment.