Title: On "Solutions" to the Ecological Inference Problem Authors: D. A. Freedman, S. P. Klein, M. Ostland and M. Roberts Date: April 1998 Pub: PDF Url: http://www.stat.berkeley.edu/~census/515.pdf Abstract: In his 1997 book, King announced "A Solution to the Ecological Inference Problem". This paper tests King's method on data sets where truth is known. His announcement is premature. In the test data, his method produces results that are far from truth, and diagnostics are unreliable. Ecological regression makes estimates that are similar to King's, while the neighborhood model is much more accurate.