WALD TEST HELP

[miteshkay]

Hi I'm doing a Wald test coefficient restriction , however i need some help.

Im testing whether an extra 0.25% in the real per capita GDP growth rate has double the effect than a decrease of 0.5% in inflation, on vote.

i was wonderen what would the equation be for this to be done?
C(2) representing inflation and C(3) representing growth

Thank you very much