Vertical Integration, Supplier Behavior, and Quality Upgrading among Exporters

Working Paper: NBER ID: w23949

Authors: Christopher Hansman; Jonas Hjort; Gianmarco Len; Matthieu Teachout

Abstract: We study the relationship between firms’ output quality and their choice of organizational structure. To do so, we use data on each step of the production and transaction chain that makes up Peruvian fishmeal manufacturing. We first show that quality upgrading is an important motive for vertically integrating. Firms integrate suppliers when the quality premium—the relative price of high quality output—rises for exogenous reasons, but not when average or low quality prices rise. The greater a firm’s scope for shifting low to high quality production, the greater its integration response. We then show that integration changes suppliers’ production behavior. A given supplier’s actions are less geared towards increasing quantity and more geared towards maintaining input quality after the supplier is integrated and loses access to alternative pay-per-kilo buyers. Finally, we show that firms and individual plants that use integrated suppliers at the time of production ultimately produce a significantly higher share of high quality output. In sum, our results suggest that firms change their organizational structure when their output quality objectives change because controlling the incentives of independent suppliers facing a quantity-quality trade-off is difficult, as classical theories of the firm predict.

Keywords: Vertical Integration; Supplier Behavior; Quality Upgrading; Exporters; Fishmeal Manufacturing

JEL Codes: D21


Causal Claims Network Graph

Edges that are evidenced by causal inference methods are in orange, and the rest are in light blue.


Causal Claims

CauseEffect
Quality Premium (L15)Vertical Integration (L22)
Vertical Integration (L22)Supplier Focus on Input Quality (L15)
Vertical Integration (L22)Higher Share of High Quality Output (L15)

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