SSRN Electronic Journal
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Endogenous Production Networks

Publication Date Jan 1, 2017

Abstract

We develop a tractable model of endogenous production networks. Each one of a number of products can be produced by combining labor and an endogenous subset of the other products as inputs. Different combinations of inputs generate (prespecified) levels of productivity. Markets are “contestable” in the sense that production technologies are available to a large number of potential producers. We establish the existence and uniqueness of an equilibrium with an endogenous production network and provide comparative static results on how prices and endogenous technology choices (and thus the production network) respond to changes in parameters. These results show that improvements in technology (or reductions in distortions) spread throughout the economy via input-output linkages and reduce all prices, and under reasonable restrictions on the menu of production technologies, also lead to a denser production network. Using a dynamic version of the model, we show that the endogenous evolution of the production network could be a powerful force towards sustained economic growth. At the root of this result is the fact that the arrival of a few new products expands the set of technological possibilities of all existing industries by a large amount — that is, if there are n products, the arrival of one more new product increases the combinations of inputs that each existing product can use from 2n-1 to 2n , thus enabling significantly more pronounced cost reductions from the choice of optimal technology combinations. These cost reducti...

Concepts
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Production Network
Lower Input Prices
Input-output Linkages
Reductions In Distortions
Combinations Of Inputs
Sustained Economic Growth
Improvements In Technology
Large Amount
Powerful Force
Levels Of Productivity

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