Is the fall in overall productivity growth in the United States and other developed countries related to the rising share of the service sectors in the economy? Since services represent well over half of the U.S. gross national product, it is also important to ask whether these sectors have had...

In 1945, Vannevar Bush, founder of Raytheon and one-time engineering dean at MIT, delivered a report to the president of the United States that argued for the importance of public support for science, and the importance of science for the future of the nation. The report, Science: The Endless...

This paper devises new methods for measuring firms' sunk costs and their effect on market structure. It builds on our earlier work that estimated the size of unobserved fixed costs from entry thresholds, the amount of market demand necessary to support a new entrant. Here we show that...