by the 1880, the cornstock lode had produced

a. $300 million worth of silver.

b. less than $10 million worth of gold and silver.

c. $800 million worth of gold.

d. about $20 million worth of copper and lead.

Mankiw attributes – chapter 1 and his 10 principles – differences in living standards within a countryover time and across countries at a moment in time to: a. the presence or absence of inflation and unemployment.b. the allocation of resources between private markets and the public sector.c. those that have dealt successfully with the efficiency v. equality tradeoff and those that haven’t.d. differences in productivity.e. ones that think at the margin and respond to incentives and those that don’t.