I train the k-nearest neighbors (KNN) and random forests (RF) machine learning models to predict if a firm will issue debt, or equity, in the upcoming quarter. KNN predicts 94% of debt and 80% of equity issues correctly. RF predicts 95% of debt and 86% of equity issues correctly. KNN is 92%...

Economists expect positive returns to investments in infrastructure. However a project with higher national returns might have less favourable effects on a regional level than the alternative. Therefore new infrastructure should also be assessed on a regional level, but econom(etr)ic evaluation...