One of your classmates suspects that ants might be attracted to the scent of sugar cookie candles. They collect two hundred ants and set up a wooden bridge that leads from the glass rim of a lit candle to the rim of an empty glass jar. Then, they test one hundred ants by placing each ant on the center of the bridge and recording which side the ant crawls to. As a control, they test one hundred ants using a bridge between two empty glass jars. What is a flaw in this experiment?

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.