The period from 2007 to 2009 was a time of economic contraction that came to be known as the "Great Recession." During periods of recession, most firms experience a decline in demand for their product, as well as a decline in the product's equilibrium price. All other things being equal, macroeconomic theory predicts that the wage of most workers should decline in recessionary periods. However, this was not the case in the Great Recession, or during many other economic downturns throughout recent history. Based on the discussion in the chapter, explain why this might be so, and what the implications are for unemployment.?