Using a new administrative dataset, we provide fresh micro-level evidence on firms’ returns to scale (RTS). We employ a new administrative database, iBACH, which contains extensive high-quality annual balance sheet, financial, and demographic information on more than two million non-financial...

Economists often model the delicate relationship between production, innovation, and economic growth as a production function that exhibits increasing returns to scale (IRS). The existence of "knowledge spillovers" or "learning by doing" often implies conclusions about the optimal use of...