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Human capital raises rural incomes, but this effect is swamped by higher returns to human capital in urban markets. This leads to "brain drain" from rural areas. Populations grow more rapidly in rural counties that have a diversified employment base. Farm population grows faster (or declines more slowly) in counties with relatively high farm income, and nonfarm populations grow faster in counties with relatively high nonfarm income. However, higher farm incomes lead to slower nonfarm population growth and vice versa. Rural county government services financed by local taxes or debt have neutral or negative effects on population growth.

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Epoxy nanocomposite coatings containing self-assembled α-zirconium phosphate nanoplatelets (ZrP) in smectic order were successfully prepared by spray-coating on an aluminum substrate using a simple, energy-efficient fabrication process that is suitable for industrial practices.

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