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An Assignment Model of Knowledge Diffusion and Income Inequality
Randomness in individual discovery disperses productivities, whereas learning from others keeps productivities together. Long-run growth and persistent earnings inequality emerge when these two mechanisms for knowledge accumulation are combined. This paper considers an economy in which those with more useful knowledge can teach others, with competitive markets assigning students to teachers. In equilibrium, students with an ability to learn quickly are assigned to teachers with the most productive knowledge. This sorting on ability implies large differences in earnings distributions ...
Report
Need for Speed: Quality of Innovations and the Allocation of Inventors
This paper studies how the speed-quality tradeoff in innovation interacts with firm dynamics, concentration, and economic growth. Empirically, we document long-run trends in the increasing speed of innovation alongside declining quality at large firms. Leveraging variation from an exogenous policy change, we document the existence of the speed-quality tradeoff both at the firm and aggregate level. We develop an endogenous growth model that incorporates the speed-quality tradeoff and show that allocating less labor towards speed increases growth, particularly in the presence of private ...
Working Paper
Connecting to Power: Political Connections, Innovation, and Firm Dynamics
How do political connections affect firm dynamics, innovation, and creative destruction? To answer this question, we build a firm dynamics model, where we allow firms to invest in innovation and/or political connection to advance their productivity and to overcome certain market frictions. Our model generates a number of theoretical testable predictions and highlights a new interaction between static gains and dynamic losses from rent-seeking in aggregate productivity. We test the predictions of our model using a brand-new dataset on Italian firms and their workers. Our dataset spans the ...
Working Paper
Innovation, Deregulation, and the Life Cycle of a Financial Service Industry
This paper examines innovation, deregulation, and fi rm dynamics over the life cycle of the U.S. ATM and debit card industry. In doing so, we construct a dynamic equilibrium model to study how a major product innovation (introducing the new debit card function) interacted with banking deregulation drove the industry shakeout. Calibrating the model to a novel data set on ATM network entry,exit, size, and product offerings shows that our theory fits the quantitative pattern of the industry well. The model also allows us to conduct counterfactual analyses to evaluate the respective roles that ...
Journal Article
The Visible Hand: The Role of Government in China’s Long-Awaited Industrial Revolution
China is undergoing its long-awaited industrial revolution. There is no shortage of commentary and opinion on this dramatic period, but few have attempted to provide a coherent, in-depth, politicaleconomic framework that explains the fundamental mechanisms behind China?s rapid industrialization. This article reviews the New Stage Theory of economic development put forth by Wen (2016a). It illuminates the critical sequence of developmental stages since the reforms enacted by Deng Xiaoping in 1978: namely, small-scale commercialized agricultural production, proto-industrialization in the ...
Working Paper
Comparative Advantage in Innovation and Production
This paper develops a multi-country, general equilibrium, semi endogenous growth model of innovation and trade in which specialization in innovation and production are jointly determined. The distinctive element of the model is the ability of the agents to direct their research efforts to specific goods, in a context of heterogeneous innovation capabilities across countries and contemporaneous decreasing returns to R&D. The model features a two-way relationship between trade and technology absent in standard quantitative Ricardian trade models. I calibrate the model using a sample of 29 ...
Discussion Paper
How Censorship Resistant Are Decentralized Systems?
Public permissionless blockchains are designed to be censorship resistant, meaning access to the blockchain is unhampered. In practice, different blockchain ecosystem actors (such as users, builders, or proposers) can influence the degree to which a blockchain is resistant to censorship. In a recent Staff Report, we examine how sanctions imposed by the Office of Foreign Assets Control (OFAC) on Tornado Cash, a set of noncustodial cryptocurrency smart contracts on Ethereum, affected Tornado Cash and the broader Ethereum network. In this post, we summarize findings regarding sanction ...
Working Paper
DO NON-COMPETE COVENANTS INFLUENCE STATE STARTUP ACTIVITY? EVIDENCE FROM THE MICHIGAN EXPERIMENT
This paper examines how the enforceability of employee non compete agreements affects the entry of new establishments and jobs created by these new firms. We use a panel of startup activity for the U.S. states for the period 1977 to 2013. We exploit Michigan’s inadvertent policy reversal in 1985 that transformed the state from a non enforcing to an enforcing state as a quasinatural experiment to estimate the causal effect of enforcement on startup activity. In a difference-in-difference framework, we find little support for the widely held view that enforcement of non-compete agreements ...
Working Paper
Entrepreneurship through Employee Mobility, Innovation, and Growth
Firm-level productivity differences are big and largely ascribed to ex-ante heterogeneity in the entrepreneurs’ growth potential at birth. Where do these ex-ante differences come from, and what can the policy do to encourage the entry of high-growth entrepreneurs? I study empirically and by means of a quantitative growth model the spinout firms: the firms founded by former employees of the incumbent firms. By focusing on innovating spinouts identified through the inventor mobility in the patent data, I document that spinout entrants significantly outperform regular entrants throughout their ...
Working Paper
The Paper Trail of Knowledge Spillovers: Evidence from Patent Interferences [REVISED]
REVISED 9/2019: We show evidence of localized knowledge spillovers using a new database of multiple invention from U.S. patent interferences terminated between 1998 and 2014. Patent interferences resulted when two or more independent parties simultaneously submitted identical claims of invention to the U.S. Patent Office. Following the idea that inventors of identical inventions share common knowledge inputs, interferences provide a new method for measuring spillovers of tacit knowledge compared with existing (and noisy) measures such as citation links. Using matched pairs of inventors to ...