After microblading fades, brows can blur, change color, or lose definition. Brow expert Kristie Streicher explains how ...

Veganism excludes all animal foods, including dairy, eggs, meat, seafood, and products like honey. Vegetarian diets are beneficial for protecting against heart disease and type 2 diabetes, and may ...

This paper surveys econometric innovations related to differences-in-differences estimators and to event-study models with time-varying treatment effects. Our discussion highlights tricky ...