Since 1996, _____
a. U.S. productivity growth has skyrocketed, at least initially, as more computers were installed
b. the computer sector has grown faster than the U.S. economy as a whole
c. spending on computers has been approximately constant as a fraction of total U.S. investment spending
d. the contribution of computers to U.S. productivity growth has been negative
e. computing technology has not improved enough to have a measurable impact on U.S. productivity
a
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