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IMPACT OF TAXES AND TRANSFERS

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Enami, Lustig, Aranda, No. 25, November 2016<br />

The element on the right-hand side shows the change in the Gini coefficient (from pre-fiscal<br />

to post-fiscal income) when all taxes and transfers other than tax T k are in place. Without loss<br />

of generality and for simplicity, we will set k = 1. Using equation 13, we have<br />

∑ n<br />

RS m<br />

RS<br />

i=1 (1−g i )П Ti +∑ j=1(1+b j )ρ Bj<br />

1−∑n<br />

i=1 g i +∑m<br />

> ∑ n (1−g i )П RS m<br />

RS<br />

i=2 T +∑ i j=1(1+b j )ρ Bj<br />

j=1 b j<br />

1−∑n<br />

i=2 g i +∑m<br />

j=1 b j<br />

.<br />

The analysis goes similarly. After some rearranging, we have<br />

(40) П RS T1 > ( −g 1<br />

) ( ∑<br />

1−g 1<br />

or equivalently,<br />

n (1−g i )П RS m<br />

RS<br />

i=2 T +∑ (1+b i j=1 j )ρ Bj<br />

1−∑n<br />

i=2 g i +∑m<br />

j=1 b j<br />

)<br />

(40b)<br />

K > − ( ∑ g iП Ti<br />

П T1<br />

n K m K<br />

i=2 +∑j=1<br />

b j ρ Bj<br />

1−∑n<br />

i=2 g i +∑m<br />

j=1 b j<br />

).<br />

Therefore, for T 1 to be equalizing when (n − 1) taxes and m benefits are already in place, the<br />

following conditions apply.<br />

Condition 41:<br />

If and only if П RS T1 > ( −g 1<br />

) ( ∑<br />

1−g 1<br />

− ( ∑<br />

n<br />

g K m K<br />

i=2 iП Ti +∑j=1<br />

b j ρ Bj<br />

1−∑n<br />

i=2 g i +∑m<br />

j=1 b j<br />

n (1−g i )П RS m<br />

RS<br />

i=2 T +∑ (1+b i j=1 j )ρ Bj<br />

1−∑n<br />

i=2 g i +∑m<br />

j=1 b j<br />

)), then adding T 1 reduces the inequality.<br />

) (or П T1<br />

K ><br />

Condition 42:<br />

39

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