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Pierre André Chiappori (Columbia) "Family Economics" - Cemmap

Pierre André Chiappori (Columbia) "Family Economics" - Cemmap

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7. Matching on the Marriage Market: Theory 329<br />

requires the existence of surplus allocations such that<br />

which implies that<br />

u¯x,y0 + vx0 ,ym ≥ h(¯x, ym),<br />

ux0 ,ym + v¯x,y ≥ h(x 0 ,y 0 ),<br />

u¯x,y 0 + v¯x,y0 = h(¯x, y0),<br />

ux0ym + vx0 ,ym = h(x 0 ,ym),<br />

h(¯x, y0)+h(x 0 ,ym) ≥ h(x 0 ,y 0 )+h(¯x, ym)<br />

and contradicts (strict) sub modularity. Eliminating this couple, and restricting<br />

attention to the next best pair, that is the second best man among<br />

men and the second worst woman among all married women must marry<br />

too, and so on.

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