We examine Becker’s (1960) contention that children are “normal.” For the cross section of non-Hispanic white married couples in the U.S., we show that when we restrict comparisons to similarly-educated women living in similarly-expensive locations, completed fertility is positively correlated with the husband’s income. The empirical evidence is consistent with children being “normal.” In an effort to show causal effects, we analyze the localized impact on fertility of the mid-1970s increase in world energy prices – an exogenous shock that substantially increased men’s incomes in the Appalachian coal-mining region. Empirical evidence for that population indicates that fertility increases in men’s income.

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Economists generally assume, implicitly, that "the return to schooling" is invariant across local labor markets. We demonstrate that this outcome pertains if and only if preferences are homothetic-a special case that seems unlikely. Our theory predicts that returns to education will instead be relatively low in expensive high-amenity locations. Our analysis of U.S. data provides support for this contention; returns to college are especially low in such cities as San Francisco and Seattle. Our findings call into question standard empirical exercises in labor economics that treat the returns to education as a single parameter. (c) 2009 by The University of Chicago.

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