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Nonparametric-two-Step Estimation of Unknown Regression Functions when the Regressors and the Regression Error Are not Independent.
Ng, S., (1995)
Nonparametric two-step estimation of unknown regression functions when the regressors and the regression error are not independent
Ng, Serena, (1995)
The Risky Spread, Investment, and Monetary Policy Transmission: Evidence on the Role of Asymmetric Information.