Problem in using simarwilson command

[Vikas Dixit]

Hello all! For a research investigation of mine, I wish to estimate two-stage DEA-bootstrap regression using simarwilson command in Stata. My dataset consists of three output variables (named Oup1, Oup2, Oup3) , three input variables (named Exp1, Exp2, Exp3), three exogenous (or environmental) variables (named Exo1, Exo2, Exo3); all variables pertain to a single year for twenty-nine (29) DMUs. I want to use Algorithm 2 proposed by Simar and Wilson. For this reason, I wish to instruct the simarwilson command to calculate the radial efficiency scores internally. Following the syntax of the simarwilson command for the purpose, when I run simarwilson command with all necessary specifications, I get the error message that the command teradial is not recognised. Please tell where I am going wrong! For your kind perusal, I am copying below the contents from the result window after running the command.

. use "C:\Users\Vikas Dixit\Downloads\Stata-Exercise.dta"

. . simarwilson (Oup1 Oup2 Oup3 = Exp1 Exp2 Exp3) Exo1 Exo2 Exo3, alg(2) rts(v) base(o) tename(DEArdo) tebc(DEAbc) biaste(DEAb) reps(2000) bcreps(100)
command teradial is unrecognized
r(199);

.

[Rich Goldstein]

apparently you have not installed this program; note that the help for simarwilson tells us that this command is required to be installed to use certain options; to find and install, type -search teradial- (it is from the SJ)

[Vikas Dixit]

Many thanks, Sir for your help! Actually, first of all, I am a new user of Stata, and second, I am visually challenged and thus rely on screen reader for my work. Stata generally does not cooperate well with screen readers, more especially in the help window. After taking sighted assistance, I could manage to install the required package, and now my problem is solved. Thank you once again. I hope future versions of Stata will consider of being more inclusive for those who work with screen readers!
Regards!
Vikas Dixit