The biggest contribution to real U.S. GDP growth in the 1970s was due to growth in
A) total factor productivity.
B) the capital stock.
C) the labor force.
D) both the capital stock and the labor force.
Question 2
In 2008, the wealth of U.S. households fell by ________.
A) 11 million
B) 11 billion
C) 11 trillion
D) 11 gajillion