A more thorough explanation:

A doing-business statute is a law in a state that outlines the actions that qualify as conducting business in that state. The purpose of this law is to determine when the state's courts can exercise personal jurisdiction over a nonresident.

For example, if a company based in California sells products to customers in New York, they may be subject to the jurisdiction of New York courts if they meet the criteria outlined in New York's doing-business statute. This could include having a physical presence in the state, such as a store or office, or conducting a certain amount of business within the state.

Another example could be a freelance writer based in Texas who writes articles for a magazine based in Florida. If the magazine does not pay the writer for their work, the writer may be able to sue the magazine in Florida courts if they meet the criteria outlined in Florida's doing-business statute.

In summary, a doing-business statute is a law that helps determine when a state's courts can exercise jurisdiction over a nonresident based on their business activities within the state.