@article{Chang:234927,
      recid = {234927},
      author = {Chang, theodore and Kott, Phillip S.},
      title = {Modeling NML Using the Area Frame Survey},
      address = {2004-08-27},
      number = {1496-2016-130606},
      pages = {30},
      month = {Aug},
      year = {2004},
      abstract = {This report outlines the results of various experiments to  model the probability of
an area-frame farm not being on  the census mailing list (NML) using covariates such
as  total sales, type of farm, acreage, various operator  characteristics (gender, Hispanic
status, race, and whether  the primaryl occupation of the principal operator is  farming),
number (if any) of equine on the farm, and,  optionally, Area-Frame-Survey stratum.
Three sets of  experiments were conducted. The ¯rst used California data  only. The
second used data from three states - Illinois,  Indiana, and Iowa, while the third used
data from the  entire 48 contiguous states (there is no Area Frame Survey  in either
Alaska or Hawaii).
The statistical methodology  employed was logistic regression with a modi¯cation  of
stepwise regression for variable selection. Standard  errors were estimated using design-
based linearization  methods.
Conclusions are drawn about the nature of 2002 NML  farms. Some are as expected
(farms with small total sales  are more likely to be NML). Others are surprising  (holding
all other factors constant, point farms are not  sgni¯cantly more likely to be NML than
other farms with  less than $2,500 in annual sales).
A number of  methodological problems needing further research are  suggested as a
result of this study.},
      url = {http://ageconsearch.umn.edu/record/234927},
      doi = {https://doi.org/10.22004/ag.econ.234927},
}