Now suppose that we want to test the hypothesis that both the effect of prenatal visits and the intercept differ for whites and blacks. Write down this model and explain in detail how to test this hypothesis.

Answer: The results also indicate that obstetrics care is geographically and economically more accessible. The strong influence of number of visits, household wealth, education and regional poverty on the site of delivery setting suggests that policies aimed at increasing the use of obstetric care programs should be linked with the objectives of social development programs such as poverty reduction, enhancing the status of women, and increasing primary and secondary school enrollment rate among girls.