Simulated toy data that comes with the erfe package.
The dataset is generated according to a location-shift Gaussian model
which corresponds to model I of the manuscript simulation section.
The dataset is a balanced panel with 50 units and 5 within observations.
The dataset has 6 variables: id, pred1, pred2, resp, nobs, and year.
The variable id is the unit's ids, pred1 and pred2 are the main regressors.
The response variable is generated by two regressors (pred1 and pred2),
and one fixed-effect and a Gaussian error. The variable nobs is the number
of units and year is the panel number.