'linearHypothesis function in R and interaction terms
I'm running the model:
model <- lm(y~ index1*gender +education, data=data)
and trying to test the null that the effect of index1 on y is 0 when gender=1 and am wondering if the following is the correct way to think about setting up this linear combination:
linearHypothesis(model, c('index1 + index1*gender = 0'))
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