Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

Christina Majaski writes and edits finance, credit cards, and travel content. She has 14+ years of experience with print and digital publications. Vikki Velasquez is a researcher and writer who has ...

This paper studies the equilibrium and welfare implications of quantitative trade models with sector-level external economies of scale (EES). While empirical evidence highlights the importance of EES, ...

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