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household aids, male participation in home labour and so on. As only familypriority<br />
women leave the labour market when such a demand arises, women’s<br />
labour force withdrawal probability is given by<br />
p t =(1− q t ) µ,<br />
where q t is the fraction of j-women at time t, with adult women’s population<br />
normalized to 1. Thus, the withdrawal probability of women p t ,givenµ,<br />
is increasing in the proportion of women with family preferences, (1 − q t ) .<br />
It is assumed that firms know this probability p t , that is, they know the<br />
probability, on average, that a woman leaves the labour market.<br />
Because the labour market is competitive, firmsinthismodelwilldesign<br />
jobs to maximize the expected lifetime incomes of the workers that will<br />
occupy them.<br />
Firms’ problem for women-workers. Since firms cannot distinguish between<br />
the two types of women, they offer every women the same type of<br />
job.<br />
Formally, the problem for firms is to decide the on-the-job training<br />
that maximizes the expected lifetime productivity of a worker:<br />
max<br />
C<br />
[f(C) − C]+δ(1 − p t )f(C) (1)<br />
subject to a zero-profit constraint,whereδ ∈ (0, 1) is the discount factor<br />
of the firms. The optimal training to perform a job is characterized by the<br />
following first-order condition:<br />
f 0 (C) =<br />
1<br />
1+δ(1 − p t ) . (2)<br />
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