options crt;  ? 5e3
in cps78;
smpl 1,550;
olsq lnwage c ed ex exsq;                 ? (a)
olsq lnwage c fe ed ex exsq;              ? (b)
olsq lnwage c fe marr ed ex exsq;         ? (c)
infmar = fe*marr;
check = infmar - marrfe;
msd check;                                ? (d)
olsq lnwage c fe marr infmar ed ex exsq;  ? (e)
?
delete lnwage ed ex exsq fe marr marrfe infmar check;
in cps85;
smpl 1,534;
olsq lnwage c ed ex exsq;                 ? (a)
olsq lnwage c fe ed ex exsq;              ? (b)
olsq lnwage c fe marr ed ex exsq;         ? (c)
infmar = fe*marr;
check = infmar - marrfe;
msd check;                                ? (d)
olsq lnwage c fe marr infmar ed ex exsq;  ? (e)