This triple difference is Δ t ( Δ r ( Δ s ( ϕ 1 , 1 , 1 ) ) ) . {\displaystyle \Delta ^{t}(\Delta ^{r}(\Delta ^{s}(\phi _{1,1,1}))).} Triple difference results can be used to estimate unknown variables.
Ova se trostruka razlika označava kao   Δ t ( Δ r ( Δ s ( ϕ 1 , 1 , 1 ) ) ) {\displaystyle \ \Delta ^{t}(\Delta ^{r}(\Delta ^{s}(\phi _{1,1,1})))} Rezultati trostruke razlike mogu se koristiti za procjenu nepoznatih varijabli.