Why not significant?

[River Huang]

Dear All, I was asked why the estimate below (shaded) with t-value -2.04 is not statistically significant? Any comments? Thanks.

[Rich Goldstein]

you only have 3 clusters - do not use "cluster(varname)" with that small a number

[River Huang]

Thanks, Rich. Agreed, but is this related to the problem?

[Joseph Coveney]

I was asked why the estimate below (shaded) with t-value -2.04 is not statistically significant? Any comments?

Three clusters gives you two degrees of freedom.

. display in smcl as text 2 * t(2, -abs(-2.04))
.1781673

.

[River Huang]

Dear Joseph, Thanks so much. This helps.