According to the graph above, the last expansion to occur before the outbreak of World War I in 1914 had a duration of ________

The opportunity cost of owner-provided labor is the

A) wage rate paid to the owner. B) explicit part of the wage rate paid to the owner. C) salary the owner could have made if she worked at her best alternative job. D) profit after all of the bills have been paid.

An economist would argue that global warming is

a. unquestionably a human-generated problem that should be stopped immediately at all costs. b. simply fear mongering, for there is no scientific evidence that the average temperature on earth is changing. c. likely to cause massive starvation as temperatures on earth rise, reducing agricultural productivity. d. a serious issue that may best be addressed primarily by making changes as problems occur in the future.