The commonly-used satellite images of nighttime lights fail to capture the true brightness of most cities. We show that night lights are a reliable proxy for economic activity at the city level, provided they are first corrected for top-coding. We present a stylized model of urban luminosity and...

Not everybody is benefiting equally from rising mean incomes. We discuss the mean-income population share (MPS), defined as the population share earning less than the mean income, as an indicator of how representative the mean income is for the mass of the population. This measure is both...