3 papers
econ.EM2026
Ridge Estimation of High Dimensional Two-Way Fixed Effect Regression
Junnan He, Jean-Marc Robin
We study a ridge estimator for the high-dimensional two-way fixed effect regression model with a sparse bipartite network. We develop concentration inequalities showing that when t…
econ.GN2025
Getting There and Getting In: How Mobility and Sorting Keep Women out of Top Startup Accelerators
Chuan Chen, Michele Fioretti, Junnan He +1
Startup accelerators are a leading gateway to venture capital, but top programs often require founders to relocate to a venture hub. From a hand-collected census of U.S. accelerato…
econ.GN2024
Capacity, Technology Portfolios, and the Paradox of Concentration
Michele Fioretti, Junnan He, Jorge Tamayo
Does limiting the largest firm's capacity always lower prices? We model firms competing in supply schedules with multiple technologies, each with constant marginal cost up to capac…