Use the National Longitudinal Survey Youth Sample dataset (wagepan) for the questions that follow. The data has been analyzed by Vella and Verbeek (1998) in their study on the impact union membership has on wages for young males.
(a) Create a new variable equal to the exponential of lwage
(b) Generate a new variable, for each observation, that represents annual salary.
(c) Collapse the data to obtain the mean annual salary by year and ethnic/racial group, black, hispanic, other, etc.
(d) Generate a line graph showing the mean annual salary over time, for each ethnic/racial group.