Install Xtserial Stata Instant
ssc install xtserial Or, if you prefer to install from the search results:
xtserial is a user-written command used to test for serial correlation in panel data models. install xtserial stata
findit xtserial Then click on the link to install from SSC (Statistical Software Components). ssc install xtserial Or, if you prefer to
Here's the text you can use to install xtserial in Stata: ssc install xtserial Or