Design for interdependence

Economists have a polite word for the costs a business creates but does not pay: externalities. A factory's smoke, a platform's effect on teenagers' sleep, a bank's contribution to a housing bubble. The first Imperative starts from a simple observation: an economy that runs on externalities is not efficient, it is just badly measured. "Design for interdependence" is the attempt to fix the measurement, and then the design.

Three things it means in practice

1. Price what is currently free

Carbon pricing is the obvious example, and the one with the best evidence: where it exists and is high enough, emissions fall. The same logic applies, with more difficulty, to water, land use, waste and the health costs of products. The policy tools are taxes, tradable permits and liability rules. The corporate tool is internal pricing, where a company charges its own divisions for the externalities they create.

2. Give the long term a vote

Markets discount the future, and quarterly reporting discounts it harder. Interdependence across time means governance that can weigh a cost in 2040 against a profit in 2027: longer executive tenure and vesting periods, long-term shareholder structures, and disclosure of transition plans with dates attached.

3. Stop the three-sector relay race

For most of the twentieth century the division of labour was clear: business creates wealth, government redistributes it, charities patch the gaps. Interdependence says this sequencing is the problem. Pollution that government cleans up after the fact costs more than pollution that was never profitable. Designing for interdependence means business, government and civil society acting on the same problem at the same time, with business accepting rules it would once have lobbied against.

The evidence, briefly

• Carbon pricing schemes covering about a quarter of global emissions have measurable effects on industrial emissions where prices exceed roughly fifty dollars per tonne; below that, effects are small.
• Companies with longer-horizon ownership (family, foundation or employee ownership) tend to invest more in research and training and to survive downturns better, although the causality is debated.
• Voluntary externality pricing inside companies is widespread in name and rare in effect: most internal carbon prices are too low to change investment decisions.

The objection worth taking seriously

"Interdependence" can become an excuse for every interest to claim a veto. The answer is specificity: name the externality, measure it, price it, and say who pays. A principle that cannot be turned into a number is a slogan.

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