Hello Stata users, I came across this issue and I am trying to solve it, I am using a Tobit model, finding difficulty in applying the postestimations, spent plenty of time looking for resources on the internet but nothing is beneficial so far, after tobit I am using tsset code yr as it is cross-sectional times series dataset for several countries. I would like to test for heteroskedasticity and serial correlation. Does anyone know what would be the appropriate tests and the corresponding commands? I am trying to find the appropriate commands but it is taking plenty of time. Thank you in advance.