In a ________ tax system, the marginal tax rate declines with income

SW's per-seat revenue on the same 1,000-mile trip length was higher than that of every airline except ______.

Fill in the blank(s) with the appropriate word(s).

The difference between the gross public debt and the net public debt is that the

A. gross public debt includes entitlements while the net public debt does not. B. gross public debt includes government interagency borrowing while the net public debt does not. C. the gross public debt is expressed as a percentage of GDP while the net public debt is not. D. gross public debt is based on budget deficit while the net public debt is not based on budget deficits.