can you account for the absence of a variable in a regression model why is a seller absent in an auction how to account for presence of variable in regression can you account for the presence of a variable in a regression when accounting for the presence of a variable in regression why is it important to account for buyer presence? what is the dummy variable in regression what is the dummy variable for the buyer what variable is included in a dummy variable which of the following is an example of a continuous variable? how to model a linear regression with 5 bidders which variables are considered non dummy why do we include a dummy variable in regression how many buyers are present for an auction what variables are used to model a regression how to account for dummy variables in regression what is the example of accounting for the presence of a variable? what is the role of a variable in a regression which variable must be in a linear regression to account for the presence or absence of the buyer? how to model for absence of a variable in regression