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Acemoglu新作:The Race Between Man and Machine

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资源简介
The Race Between Man and Machine: Implications of Technology for Growth, Factor Shares and
Employment
 
Daron Acemoglu
MIT
 
Pascual Restrepo
MIT
 
December 2015
 
Abstract
 
    The advent of automation and the simultaneous decline in the labor share and employment
among advanced economies raises concerns that labor will be marginalized and made redundant by new technologies. This paper examines this proposition in a task-based framework wherein not only are tasks previously performed by labor automated, but also more complex versions of existing tasks, in which labor has a comparative advantage, can be created. We fully characterize the structure of equilibrium in this model, establishing how the allocation of factors to tasks and factor prices are determined by the available technology and the endogenous choices of firms between capital and labor. We then demonstrate that although automation tends to reduce employment and the share of labor in national income, the creation of more complex tasks has the opposite effect.
    Our full model endogenizes the direction of research and development towards automation
and the creation of new complex tasks. We show that, under reasonable conditions, there exists
a stable balanced growth path in which the two types of innovations go hand-in-hand. Conse-
quently, an increase in automation reduces the wage to rental rate ratio, and thus discourages
further automation, encourages greater creation of more labor-intensive tasks, and restores the
share of labor in national income and the employment to population ratio back towards their
initial values. Though the economy is self-correcting, the equilibrium allocation of research ef-
fort is not optimal: to the extent that wages reflect quasi-rents for workers, firms will engage in
too much automation. Finally, we extend the model to include workers of different skills. We
find that inequality increases during transitions, but the self-correcting forces also serve to limit
the increase in inequality over longer periods.
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