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You can install the development version of ei like so:



EI: A(n R) Program for Ecological Inference

Authors: Gary King, Margaret Roberts

This program provides a method of inferring individual behavior from aggregate data. It implements the statistical procedures, diagnostics, and graphics from the book A Solution to the Ecological Inference Problem: Reconstructing Individual Behavior from Aggregate Data (Princeton: Princeton University Press, 1997), by Gary King.

For more information, see here: