I am running a probit model to assess the determinants of private tutoring participation. One of the regressors I'm using is the teacher attendance ratio at school. The hypothesis is that higher teacher attendance should be correlated with lower tutoring.

My concern is regarding the interpretation of the coefficient of this variable. Naturally, in probit models, the coefficient itself doesn't have a meaning, and one needs to calculate the marginal effect. Should I use the dydx option with margins? What would be the interpretation of this variable which is measured as a ratio?

A similar question is posted here https://www.statalist.org/forums/for...tory-variables
However, it doesn't entirely resolve my doubt.

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