Question: Detroit Oil Refinery Expansion Approved Marathon Oil Saturday started work on a $1.9 billion expansion of its gasoline refinery in Detroit. Marathon will employ 800 construction workers and add 135 permanent jobs to the existing 480 workers at the refinery.
Source: United Press International, June 21, 2008
a. Explain how rising gasoline prices influence the market for refinery labour.
b. Draw a graph to illustrate the effects of rising gasoline prices on the market for refinery labour.