I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the passage "In economics, notable Nobel Memorial Prize in Economic Sciences winners Milton Friedman, a major advisor to Republican U.S. President Ronald Reagan and Conservative British Prime Minister Margaret Thatcher, George Stigler, Nobel laureate and proponent of regulatory capture theory, Gary Becker, an important contributor to the family economics branch of economics, Herbert A. Simon, responsible for the modern interpretation of the concept of organizational decision-making, Paul Samuelson, the first American to win the Nobel Memorial Prize in Economic Sciences, and Eugene Fama, known for his work on portfolio theory, asset pricing and stock market behaviour, are all graduates. American economist, social theorist, political philosopher, and author Thomas Sowell is also an alumnus."? 

What alumni was a proponent of regulatory capture theory?