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$K N I C T I N D E X_{r, t} = (I C T T e l e p h o n e I n d e x_{r, t} + I C T M o b i l e I n d e x_{r, t} + I C T B r o a d I n d e x_{r, t} + I C T C o m p u t e r s I n d e x_{r, t}) / 4$

$I C T T e l e p h o n e I n d e x_{r, t} = l o g (I N F R A T E L E_{r, t}) / 3$ $I C T M o b i l e I n d e x_{r, t} = I C T M O B I L_{r, t} / 100$ $I C T B r o a d I n d e x_{r, t} = I C T B R O A D_{r, t} / 100$ <math>ICTComputersIndex_{r,t}=ICTCOMPUTERS_{r,t}/100

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