Given the lack of empirical information for evaluating the research tax
credit's net benefit to society, GAO has not taken a position as to
whether the credit should be made a permanent part of the tax code or
allowed to expire. GAO has, however, concluded that if Congress decides
to extend the credit in its current form, it may also want to ensure
that the credit provides an attractive incentive to most recipients at
an acceptable revenue cost. One way this could be done is to require
that the base be reviewed and adjusted as needed.
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