Good evening!
I have a problem with plotting a graph with discontinuity. I have the following code, which brings me this picture.
graph twoway (line age year ),xtitle("year aged 17 years old") ytitle("average age") xline(1990) Array



But I would like to get something like (I took this picture from the paper of N. Powdthavee). Could you, please, advise me how to do it whether I can do it with "graph twoway" function? Array


Thank you in advance!