what a dummy variable how to estimate panel models with dummy variables how do you do a panel data model what is the function that estimate panel data why panel data model is unavailable why does regression include two dummy variables when you estimate the panel model a variable does not appear what is the dummy variable on panel data what is panel data model estimation how to estimate the panel data how to estimate panel data in excel what variables are included in the panel data model and when the dummy variables are included into the regression what variables are in a model what is the dummy in the panel data model why do dummy variables not show up in the summary of the model? do dummy variables have to be included in the data model? how many variables does panel data include in the regression model which of the following is included in a panel data model? what is the difference between a panel data model and a simple regression model? when you insert dummy variable into a regression, what happens