when to insert lag in a regression? when to use a dummy for a lag when to use a positive and negative tweet in regression how to interpret a dummy analysis is twitter a dependent variable does tweets have lag can i test for lags in the regression i created a dummy variable because i wanted to look at the strength of social media instead of the original news media. when i used the first differences and ran a regression i came to the conclusion that lags in panel regression do dummy variables work with fixed effects how to interpret the result if you used a dummy and fixed effects how to interpret lag in linear regression why use a dummy in a regression analysis how to interpret lags what is the lags in a regression how to interpret a dummy for a regression how do you interpret results after lags in the fixed effects model? can you use the dummy in a regression model? why or why not? how is lags in regression model used how to interpret a panel based on the data