what dummy variables are used to regress in a regression model what is the result when a dummy is added what are the results of adding dummies when add a dummy variable to a linear model what is the dummy variable in the equation for a linear model? what is the coefficient of a dummy variable explain why the coefficient of $(*)$ might change with the addition of two additional variables. why does the coefficient change when calculating a dummy variable why are coefficients dummy in regression why does y change with adding dummy variables how do you figure out whether the dummy variable affects changes in a linear model how does a dummy variable affect a model how to find causes of change how to explain changes caused by dummy variables? explain dummy variables in linear model? why does the salary coefficient change what is dummy variables in a linear model what is the coefficients of a dummy variable? how do dummy variables cause changes in the coefficients how to explain dummy variables