measuring productivity

[christian a. gregory]

OECD Economic Outlook reports that, depending on which measurments you use,
labor productivity growth in the U.S. could be as low as 1.0% or as high as
1.9%. They say you can measure output for these calculations by both an
income and and expenditure measure. How do they account for the differences
in the two measurments? Likewise, there's an establishment and household
account of employment, and they are different. Do they have a way to account
for statistical discrepancies in these figures?

Christian