Labour Market Institutions and the Personal Distribution of Income in the OECD



dL      ∂f / ∂γ

— = - g —--- < 0

dγ        ∆1

dL-   δ > 0

dK  ∆1

dL _ f ∙∂g / ∂B + ∆ 3

dB         ∆1

From (A.6)-(A.9) we can now establish the effects of an increase in union bargaining power:

dL     dH     dx     dθ     dh     dω

— < 0, --< 0, — > 0, — > 0, — > 0, --< 0.

dγ    dγ    dγ    dγ    dγ    dγ

An increase in the capital stock raises both skilled and unskilled employment, dL / dK > 0 ,
dH / dK > 0. However, the impact of K on ω and θ is ambiguous, as the increases in H , L and K
have effects of opposite sign. However, we can obtain

dh 1 dH H dL              H

____ —_____— / ] -Lrrwl _ A IO ____

Γ1 - dL K

dK LdK L2 dK"       H LK

dθ   ∂θ Γ∂X dL ∂x dH  ∂x "I  ∂θ x

---=---+--+--- =--(1

dK  ∂x ∂L dK ∂H dK  ∂K  ∂x K

_ dK L

)ε h 1

_


dL K


dK L


If the elasticity of unskilled labour with respect to capital is less than one, then these two expressions are
positive, implying
dω / dK < 0 and dθ / dK > 0 .

The effects of an increase of B are ambiguous. However, if dL / dB < 0, it is then possible to
show that

dHH dLHw

=       + s<0

dBL dBwsB

dθ
dB


∂θ ∂x dL ∂x dH
∂x ILdB ∂
h dB

>0


Case 2: σ = 0

In this case ∂θ / ∂x = 0, hence ∆ = 0, 1 < 0, 2 > 0, and 3 < 0. Then

dL     dL     dL

— < 0, --> 0, —< 0 .

dγ     dK     dB

It is straightforward to show that the effects on ω are as in case 1, while there is no impact on θ .

Case 3: σ < 0

In this case ∂θ / ∂x < 0 , hence ∆ > 0, 3 < 0, and 1 and 2 can be positive or negative. From the
expressions in (A.12) to (A.14), it is clear that the comparative statics cannot be signed.

33



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