The 1981 economic recovery act ________ net investment according to ________

For a private good, the economy's marginal social benefit curve is the _______________ sum of the individual marginal benefit curves and for a public good, the economy's marginal social benefit curve is the ________________ sum of the individual marginal benefit curves.

a) horizontal; vertical b) horizontal and vertical; vertical and horizontal c) vertical; vertical d) vertical; horizontal

The benefit of a one-unit increase in an activity

A) decreases as you do more of it. B) is called rational-choice benefit. C) is called marginal cost. D) is always greater than the opportunity cost of that activity. E) is measured by what you must give u