![IconGems-Print](images/IconGems-Print.png)
137 – Calibration
Calibration for the Census of Agriculture
Andrea C. Lamas
USDA/NASS
Kelly Toppin
USDA/NASS
Matthew Williams
Department of Health and Human Services,
Linda J. Young
USDA/NASS
Clifford Spiegelman
Texas A&M University
The National Agricultural Statistics Service (NASS) conducts a Census of Agriculture every 5 years, in years ending in 2 and 7. For the 2012 Census of Agriculture, NASS used capture-recapture methods to adjust the Census for under-coverage, non-response, and misclassification of farms/non-farms. After these adjustments, the weights were calibrated and integerized. Calibration was conducted to ensure that state and national totals were unbiased for variables where administrative data were available. The integerization process rounded weights but did not change marginal totals. NASS researched alternative calibration methods applied to the Census. Here the constraints and limitations of those methods are discussed.