Using data on academic citations, career and educational histories of mathematicians, and disaggregated distance data for the world's top 1000 math departments, we study how geography and ties affect knowledge flows among scholars. The ties we consider are coauthorship, past colocation,...

In this paper, we use a detailed production survey in the Chinese manufacturing industry to estimate both revenue and physical productivity and relate our measurements to firms' trade activity. We find that Chinese exporters for largely export-oriented products like leather shoes or shirts...

This paper presents theory and evidence that tighter credit constrains force firms to produce lower quality. The paper develops a quality sorting model that predicts that tighter credit constraints faced by a firm reduce its optimal prices due to its choice of lower-quality products. Conversely,...

This paper presents theory and evidence from Chinese firm-product data that, given firm productivity, trade liberalization increases product markups. This finding calls for a reconsideration of the well-established imports-as-market-discipline hypothesis. This paper further verifies underlying...

This paper shows that the pricing behavior of exporting firms exhibits a “forward-looking” nature under sticky prices. It offers a channel by which the expectations of future exchange rates affect current prices. To seek the micro-level evidence, we adopt detailed product-level import data...

This paper presents theory and evidence on firms' import responses to exchange rate fluctuations using disaggregated Chinese imports data. The paper develops a heterogeneous-firm trade model that predicts import responses at both extensive and intensive margins as well as the more profound...

This paper explores how the distribution of credit supply within an industry affects that industry's export intensity (the export-to-sales ratio) and export propensity (the ratio of the number of exporters to the total number of firms). Using a heterogeneous firm trade model, we derive two...