... constants as follows: ,,iiwiw w ewv=∑ (18) subject to the weights being between zero and one, and summing to one: ,,1and 01iwiw w ww=≤≤∑ (19) In the estimation, the weights are treated ... ),,,,,,,lnln1lnlnijijijijijijiwiwiwiwiwIaaaawwwn=−+−∑∑∑∑∑∑∑∑A ,W: A (20) subject to the constraint equations that column and row sums be equal, and that the W s and A’s fall between zero ... structure (flow-dependent) while the CE method seeks to maintain the coefficient structure (column-coefficient-dependent).13 Assuming the same information (knowledge of row/column sums), we would...