Zesht

Interactive tools

Run the numbers yourself. Calculators and simulators that show how incentives change what people do.

Arguments about policy often stall because the mechanism is invisible. These tools make it visible. Change the inputs and watch who pays, who benefits and what people rationally do next. Each one is free to use, and free to embed on your own site with a link back.

Tool

Is the drive worth it? Sales-tax savings calculator

Los Angeles vs. Orange County: what a lower sales-tax rate saves at the register, what the trip costs, and what California says you still owe.

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Tool

Ten houses: subsidy vs. supply simulator

Give every buyer $100,000 when there are still only ten houses. Where does the money end up?

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Tool

What is a kilowatt-hour worth? Solar export value by hour

Under California's NEM 3.0, the same exported kilowatt-hour can earn a fraction of a cent or more than a dollar. See when — and what a battery changes.

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Tool

Rent control lock-in calculator

Why moving to a smaller apartment can cost more than staying in a big rent-controlled one.

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