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<math>INFRAELECACC(urban)_{r,t}=\frac{100}{1+e^{-(1.144-4.858*\frac{INCOMELT1CS_{r,t-1}}{POP_{r,t-1}}+0.837*GOVEFFECT_{r,t})}}
<math>INFRAELECACC(urban)_{r,t}=\frac{100}{1+e^{-(1.144-4.858*\frac{INCOMELT1CS_{r,t-1}}{POP_{r,t-1}}+0.837*GOVEFFECT_{r,t})}}