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$GINIDOM_{\gamma }^{t}=GINIFUN(HHINC_{R,S},HHPOP_{R,S})*GINIDomRI_{\gamma }^{t-1}$

where

<math>GINIDomRI^{t-1}_{\gamma}=\frac{GINIDOM^{t-1}_{\gamma}}{GINIFUN(HHINC^{{\gamma}-1}_{R,S},HHPOP^{t-1}_{R,S})}