The paper studies the patent productivity of scientists over their life cycle. The incentives for patenting and for … publishing are compared and how they shape life cycle productivity. In most empirical studies, publication productivity decreases … productivity over the life time. In the empirical part the patents of nearly 1000 German patent active professors are analyzed. The …

average wage starts out low for a new plant and increases along with labor productivity as the plant ages. As a plant … does not fall as fast as productivity does. A dynamic model of labor quality and quantity choice by plants is estimated to …