Insight by History

Businesses locate in cities to access the best labor pool because workers cluster where jobs exist, so firms seeking top talent must be where people are, which in turn draws more businesses into the same places.

Government agencies protect their institutional interests because departments derive jobs, funding, and authority from administering specific laws, so they resist data or policies that would shrink those programs and the careers tied to them.

Transmission voltages are stepped up at power plants because higher voltage carries the same power with lower current, which reduces resistive (I²R) losses over long lines.

To stabilize rule after seizing power, a leader should minimize the number of required key supporters because fewer allies reduce how much scarce treasure must be distributed and simplify alliance management, lowering the chance a rival can flip enough to unseat them.

Cities enable complex production because concentrated networks of thousands of specialized suppliers and workers let the many discrete inputs and processes required for goods like modern cars be coordinated far more efficiently than by isolated individuals.

Spending public resources on citizens weakens a ruler's hold because each unit spent on public goods is one less available to buy loyalty, enabling rivals to lure away supporters by promising the same benefits.

Firms cluster together because proximity lowers coordination friction with suppliers, competitors, and complementary firms, which makes collaboration and operations faster, cheaper, and more efficient.

Democratic leaders invest in public goods because raising citizens' productivity expands the tax base, so even with lower tax rates the absolute resources available to reward supporters and fund government increase.