Concept High Intuition Concept More Formal (less intuitive) More Formal (less intuitive) Differential Moran's I ( Differential Moran's I ( ) ) We compute the Moran's I We compute the Moran's I for the for the variable variable . . If there is a If there is a xed e ect xed e ect related to location related to location , it is possible to present the value at each , it is possible to present the value at each location for time location for time as the sum of some intrinsic value and the xed e ect. as the sum of some intrinsic value and the xed e ect. I I = = = = . . ∑ ∑ i i ∑ ∑ j j w wi ij j y yi i . . y yj j ∑ ∑ i i y y 2 2 i i ∑ ∑ i i ( (y yi i × × ∑ ∑ j j w wi ij j y yj j ) ) ∑ ∑ i i y y 2 2 i i y y i i, ,t t − − y y i i, ,t t− −1 1 y yi i, ,t t − − y yi i, ,t t− −1 1 μ μi i i i t t y yi i, ,t t = = y y ∗ ∗i i, ,t t + +μ μi i 15 / 20 15 / 20