Informal input suppliers, quality choice and welfare

This paper proposes a theoretical model in which a formal upstream firm competes against informal input suppliers, which constitute an alternative, albeit lower-quality input source for formal downstream firms. The existence of an alternative source increases competition in the industry, which tends to be welfare-increasing. However, it may also distort the incentives of the formal upstream firm to invest in quality upgrading. Assuming quantity competition downstream, we analyze how these incentives change and whether the negative welfare effect of a reduced investment by the upstream firm may more than offset the positive welfare effect of increased competition brought about by informal input suppliers. We find that there are parameter values such that this is the case, and welfare decreases if informal input suppliers are present. We analyze the robustness of this result to alternative modeling assumptions, such as price competition downstream and the use of two-part tariffs by the formal upstream firm.

Judicial quality, input customisation, and trade margins: the role of product quality

We study how the contracting environment affects the quality of trade. A better contracting environment not only induces specialisations in industries intensively using customised inputs, but also causes quality upgrading of domestic varieties and tougher competition in these industries. We incorporate these effects into a Ricardian model with customised input and product quality. Our model predicts that better judicial quality raises a country’s import prices and quality more in contract-intensive products, but has no impacts on its export prices or quality. We empirically confirm these predictions, and find that rising judicial quality is associated with increasing specialisations in contract-intensive industries.

Trust, Efficient Contracting and Export Upgrading

Informal contracting institutions constitute an essential part of a country’s overall contracting institution, however, the nascent literature examining the effect of contracting institutions on the quality of products a country produces and exports, have paid a limited attention on the role of informal contracting institutions. We fill this gap in the literature by examining whether higher trust levels, as an informal contracting institution, leads to product-quality upgrading by reducing contractual frictions and opportunistic behaviors. Using industry-level data spanning 1995–2014, we examined this relationship using the generalized difference-in-difference method. We find that contract-intensive industries in trust-intensive societies experience a disproportionally higher increase in the production and export of higher-quality products compared to those industries in low-trusting societies. This result holds after controlling for conventional sources of comparative advantage and formal contracting institution. Hence, the result underscores the importance of informal contracting institutions for improved economic performance and stress the crucial fact that countries with strong and efficient informal institutions can still benefit in market-related activities even in the presence of weak formal institutions.

Input Quality Upgrading from Tariff Reduction and Firm Productivity: Evidence from Ethiopian Manufacturing

Using a panel of firms from Ethiopian manufacturing census covering the period 2000–2016, this paper investigates how openness to trade help firms' input quality upgrading which further contribute to productivity gains. We estimate the quality of imported inputs at the firm level, and firm-level productivity using the Levinsohn and Petrin method. Then we estimate the effect of input tariff cut on input quality and further measure how input quality through input tariff reduction affect firms' productivity at different stages of regression. Our results suggest that input tariff reduction is associated with firms’ input quality upgrading and further with improvement in firms’ productivity.The effect of tariff cut is more pronounced for input-importing firms, and our result implies that the effect of input tariff cut motivates firms to participate in foreign input markets and helps upgrading input quality, thus contributing to firm productivity. Hence, further input trade liberalization measures should be designed to help key strategic manufacturing sectors. Besides, strategies have to be put in place to integrate the manufacturing sector into the global supply chain to reap more productivity gains. JEL codes: D22 D24 F13 H32 L15 L23