Diffusion of General Purpose Technologies

Diffusion of General Purpose Technologies
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通用技术的传播

DOI:
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发表时间:
1996
期刊:
影响因子:
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通讯作者:
M. Trajtenberg
M. Trajtenberg
中科院分区:
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文献类型:
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作者:
E. Helpman;M. Trajtenberg

文献摘要

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历史和理论都表明,通用技术(GPT),如蒸汽机或电力,可能在经济增长中发挥关键作用。在之前的一篇论文(Helpman and Trajtenberg,1994)中,我们将这一概念纳入了Grossman-Helpman增长模型,并探讨了GPT产生的经济动态。本文研究了GPT在异质最终产品部门的扩散问题。我们表明,逐步采用GPT的每个用户部门产生了一个序列的两个阶段的周期,最终带来了一段时间的持续增长。我们还分析了福利的影响,采用的顺序,通过数值模拟。作为晶体管的扩散(半导体的第一个实施例,我们这个时代的主导GPT),并寻求在模型的参数方面表征早期采用者和落后者。
History and theory alike suggest that General Purpose Technologies (GPT's), such as the steam engine or electricity, may play a key role in economic growth. In a previous paper (Helpman and Trajtenberg, 1994) we incorporated this notion into a Grossman-Helpman growth model, and explored the economy-wide dynamics that a GPT generates. The present paper deals with the diffusion of the GPT over heterogeneous final-good sectors. We show that the gradual adoption of the GPT by each user sector generates a sequence of two-phased cycles, culminating in a bringing about a spell of sustained growth. We also analyze the welfare implications of the order of adoption, by way of numerical simulations. As a diffusion of the transistor (the first embodiment of semiconductors, the dominant GPT of our era), and seek to characterize both the early adopters and the laggards in terms of the parameters of the model.