What a rule changes
Which part of the industry is a rule changing?
Vehicle sales show only part of what policy changes. Two governments on two continents put money into electric vehicles in different places in the system, and the placement changed the result. Norway subsidised public chargers alongside vehicles. The United States attached a credit to commercial vehicles, which lessors could use and buyers could not.
What this covers. China, the United States, Norway, and one study of US and Chinese supplier geography. The Norwegian comparison covers 2010 to 2015 and chargers open to all drivers. No cited study compares the effects across countries directly.
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Chinese market-access rules influenced which battery suppliers carmakers could use.
The rule directed demand toward qualified suppliers, but eligibility alone does not show how much profit they retained.
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Supplier revenue and margin must be measured separately from the demand created by a rule.
The same technology entered markets with different financing, supply and infrastructure institutions.
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The main constraint sat with different actors in each market: finance companies in US passenger sales, regulators in China and utilities at US depots.
US policy affected the transaction mainly through tax credits and leasing.
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Federal credits helped make leasing the main US electric-car sales channel, then ended on statutory dates.
When the support ended, lessors and carmakers had to reprice a transaction already under pressure from weak resale values.
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The vehicle remained available, but residual assumptions, finance terms and withdrawn support made the deal harder to complete.
Not every supply-chain move was required by policy; firms also clustered around capability, customers and capital.
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Electric- and automated-vehicle suppliers clustered in California and China without one localisation rule explaining the pattern.
Ask where in the system a rule acts, not only how much it is worth. A subsidy on the vehicle, on the charger and on the lease reach different parties and produce different results. Then look at the factories, contracts and financing structures that will remain after the rule is gone.
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