loaddata("../data/DHSY.xlsx");
// (45)** in DHSY
module("PcGive");
package("PcGive", "Single-equation");
usedata("DHSY.xlsx");
system
{
    Y = D4c;
    Z = D4y, DD4y, D4p, DD4p, D4D, "c-y_4";
}
estimate("OLS", 1959, 2, 1975, 4);

// (16.1) in book
module("PcGive");
package("PcGive", "Single-equation");
usedata("DHSY.xlsx");
system
{
    Y = D4c;
    Z = D4y, DD4y, D4p, DD4p, D4D, "c-y_4";
}
estimate("OLS", 1959, 1, 1975, 4);
