Regressors often have heterogeneous effects in the social sciences, implying unit-specific slopes. OLS is frequently applied to these correlated coefficient models. I first show that without restrictions on the relation between slopes and regressors, OLS estimates can take any value including...

This paper proposes a subsampling inference method for extreme conditional quantiles based on a self-normalized version of a local estimator for conditional quantiles, such as the local linear quantile regression estimator. The proposed method circumvents difficulty of estimating nuisance...

This paper studies the finance-growth nexus in historical perspective. We employ a panel data model with interactive fixed effects and time-varying coefficients for a sample of advanced economies since the late 19th century. The model considers flexible specifications of heterogeneity and...