英语翻译
Thesesummarymeasuresprovidesomeevidence
regardingtheconjecturedrelationshipsbetweenshipping
feesandconsumerdemand.Forexample,thefree
shippingpolicygeneratesthehighestlevelsoforderincidence
whileSchedule1,whichinvolvesordersizeincentives,
resultsinthelargestaverageordersizesbymorethan
$8.Table1alsoliststheaverageandstandarddeviation
ofinter-purchasetimesthatoccurredduringeachshipping
schedule.