Hi, my question on a worksheet is 'How would you test that the coefficient on age is 100 times the coefficient on wage?' (both age and wage are thus regressors with the dependent variable being marital status). I have a stata output which gives coefficients and standard errors for the coefficients, but I just don't know how I'm meant to combine the standard errors to use in the denominator of the t-statistic. Please advise! And also, please point me to a resource on the Internet that covers such situations. I've spent hours searching and all the sites seem to talk about simple cases of testing individual coefficients etc.