= Stata testparm =

'''`-testparm-`''' performs [[Statistics/WaldTest|Wald tests]] on regression coefficients.

See also [[Stata/Test|-test-]].

<<TableOfContents>>

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== Usage ==

`-testparm-` is identical to [[Stata/Test|-test-]] except that it only tests for equivalence to 0. Because it does not allow for non-zero tests, all arguments passed to `-testparm-` are known to be coefficient names, so syntax is generally simpler.

The following two are equivalent:

{{{
test (2.region = 0) (3.region = 0) (4.region = 0)

testparm i(2/4).region
}}}

The following two are also equivalent:

{{{
test (_b[age] = 0) (_b[c.age#c.age] = 0)

testparm c.age c.age#c.age
}}}



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CategoryRicottone