Changes in labor productivity have been a source of puzzlement and paradoxical results for economists. We suggest that puzzles and paradoxes vanish once two simple regularities are properly acknowledged. Okun and Verdoorn's Laws explain 87 percent of all the variations in labor productivity....

U.S. agricultural output more than doubled between 1948 and 2011, with growth averaging 1.49 percent per year. With little growth in total measured use of agricultural inputs, the extraordinary performance of the U.S. farm sector was driven mainly by increases in total factor productivity...

Why do cities differ so much in productivity? We document that most of the measured dispersion in productivity across US cities is spurious and reflects granularity bias: idiosyncratic heterogeneity in plant-level productivity and size, combined with finite plant counts. As a result, economies...