You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "who came up with the law of diminishing marginal utility?" whose answer is Carl Menger.
Each document should contain about 30 words, and these documents should contain useful information.

Query: origin of law of diminishing marginal utility
Useful Output:

Doc 1: The law of diminishing marginal utility is a textbook example of something that sounds remarkably complicated to the untrained eye but is
Doc 2: The law of diminishing marginal utility states that commodities become less valuable as more of them are acquired. The British economist Alfred
Doc 3: Gossen, a German economist, is the first to explain the law of diminishing marginal utility based on general observations of human behavior.
Doc 4: Nozick (1977) formulated a challenge to Austrians related to the application of the Law of diminishing marginal utility…
Doc 5: The Law of Diminishing Marginal Utility states that as a person consumes more of a good or service, the additional satisfaction (or utility) they derive from