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Variables Description:

Income Elasticity to TFP Growth (W), nominal: Intensity of the color represents level of nominal income elasticity of the origin area to TFP growth in the partner area. That is, if an area is darker, then the origin area's nominal income is very positively affected by TFP growth of that partner area. It's the visual representation of matrix W which is defined in Equation 10.

Income Elasticity to TFP Growth (U), real: Intensity of the color represents level of real income elasticity of the origin area to TFP growth in the partner area. That is, if an area is darker, then the origin area's real income is very positively affected by TFP growth of that partner area. It's the visual representation of matrix U, defined in Equation 12.