In many growth models, economic growth arises from people creating ideas, and the long-run growth rate is the product of two terms: the effective number of researchers and their research productivity. We present a wide range of evidence from various industries, products, and firms showing that...

In many growth models, economic growth arises from people creating ideas, and the long-run growth rate is the product of two terms: the effective number of researchers and their research productivity. We present a wide range of evidence from various industries, products, and firms showing that...

"Non-representational painting was one of the most radical artistic innovations of the twentieth century. Abstract painting was created independently by three great pioneers - the experimental innovators Kandinsky and Mondrian, and the conceptual Malevich - virtually simultaneously, in the years...