Final answer:
The Harrisors operate in a monopoly, as they are the only usikose in their country, granting them control over market supply and prices.
Step-by-step explanation:
Given that the Harrisors live in a country where they are the only usikose, the type of economy this example represents is a monopoly. This economic situation occurs when a single entity has exclusive control over the supply of a particular good or service, and there is no competition. This leads to the entity having the power to determine prices and control the market for its own benefit, much like in the case of a legal monopoly where the government allows only one provider because it is beneficial for social needs or due to the presence of economies of scale.