There is very little intergenerational mobility; the children of the rich stay rich and the children of the poor stay poor

The figure above shows the costs associated with producing paper. When paper is produced, there is some pollution runoff into a lake. The marginal private cost when output equals 2 tons of paper per week equals

A) $50 per ton B) $100 per ton. C) $150 per ton. D) None of the above answers is correct.

For the period 1961 to 1969, the Phillips curve for the United States displayed the same shape that A. W. Phillips found for the United Kingdom for the period 1861 to 1913---it was

A) horizontal. B) vertical. C) downward sloping. D) upward sloping.