Please answer the following question: Information: - Milton Friedman (July 31, 1912 November 16, 2006) was an American economist who received the 1976 Nobel Memorial Prize in Economic Sciences for his research on consumption analysis, monetary history and theory, and the complexity of stabilization policy. With George Stigler and others, Friedman was among the intellectual leaders of the second generation of Chicago price theory, a methodological movement at the University of Chicago's Department of Economics, Law School, and Graduate School of Business from the 1940s onward. Several students and young professors that were recruited or mentored by Friedman at Chicago went on to become leading economists; they include Gary Becker, Robert Fogel, Thomas Sowell, and Robert Lucas, Jr. - The Nobel Memorial Prize in Economic Sciences (officially , or the Swedish National Bank's Prize in Economic Sciences in Memory of Alfred Nobel), commonly referred to as the Nobel Prize in Economics, is an award for outstanding contributions to the field of economics, and generally regarded as the most prestigious award for that field. - A think tank, policy institute, or research institute is an organization that performs research and advocacy concerning topics such as social policy, political strategy, economics, military, technology, and culture. Most policy institutes are non-profit organizations, which some countries such as the United States and Canada provide with tax exempt status. Other think tanks are funded by governments, advocacy groups, or businesses, or derive revenue from consulting or research work related to their projects. - The open society is a concept originally suggested in 1932 by the French philosopher Henri Bergson, and developed during the Second World War by Austrian-born British philosopher Karl Popper. Popper saw the open society as standing on a historical continuum reaching from the organic, tribal, or closed society, through the open society marked by a critical attitude to tradition, up to the abstract or depersonalized society lacking all face-to-face interaction transactions. - Stanford University, officially Leland Stanford Junior University, is a private research university in Stanford, California, adjacent to Palo Alto and between San Jose and San Francisco. Its campus is one of the largest in the United States. Stanford also has land and facilities elsewhere. - Ludwig Heinrich Edler von Mises (29 September 1881 10 October 1973) was a theoretical Austrian School economist. Mises wrote and lectured extensively on behalf of classical liberalism. He is best known for his work on praxeology, a study of human choice and action. - The Hoover Institution is an American public policy think tank and research institution located at Stanford University in California. Its official name is the Hoover Institution on War, Revolution, and Peace. It began as a library founded in 1919 by Republican Herbert Hoover, before he became President of the United States. The library, known as the Hoover Institution Library and Archives, houses multiple archives related to Hoover, World War I, World War II, and other world history. According to the "2015 Global Go To Think Tank Index Report" (Think Tanks and Civil Societies Program, University of Pennsylvania), Hoover is #19 (of 75) in the "Top Think Tanks in the United States". - Friedrich Hayek CH (8 May 189923 March 1992), born in Austria-Hungary as Friedrich August von Hayek and frequently referred to as F. A. Hayek, was an Austrian and British economist and philosopher best known for his defense of classical liberalism. Hayek shared the 1974 Nobel Memorial Prize in Economic Sciences with Gunnar Myrdal for his "pioneering work in the theory of money and economic fluctuations and ... penetrating analysis of the interdependence of economic, social and institutional phenomena." - Sir Karl Raimund Popper (28 July 1902 17 September 1994) was an Austrian-British philosopher and professor. He is generally regarded as one of the greatest philosophers of science of the 20th century. - The President of the United States (POTUS) is the elected head of state and head of government of the United States. The president directs the executive branch of the federal government and is the commander-in-chief of the United States Armed Forces. - A flat tax (short for flat tax rate) is a tax system with a constant marginal rate, usually applied to individual or corporate income. A true flat tax would be a proportional tax, but implementations are often progressive and sometimes regressive depending on deductions and exemptions in the tax base. There are various tax systems that are labeled "flat tax" even though they are significantly different. - The Mont Pelerin Society (MPS) is an international organization composed of economists (including eight winners of the Nobel Memorial Prize in Economic Sciences), philosophers, historians, intellectuals, business leaders, and others committed to their understanding of personal and political freedom. Its founders included Friedrich Hayek, Frank Knight, Karl Popper, Ludwig von Mises, George Stigler, and Milton Friedman. The society advocates freedom of expression, free market economic policies, the political values of an open society. The members see the Society as an effort to interpret in modern terms the fundamental principles of economic society as expressed by those classical economists, political scientists, and philosophers who have inspired many in Europe, America and throughout the Western World. - San Francisco (SF) (Spanish for Saint Francis) officially the City and County of San Francisco, is the cultural, commercial, and financial center of Northern California. It is the birthplace of the United Nations. Located at the north end of the San Francisco Peninsula, San Francisco is about in area, making it the smallest countyand the only consolidated city-countywithin the state of California. With a density of about 18,451 people per square mile (7,124 people per km), San Francisco is the most densely settled large city (population greater than 200,000) in California and the second-most densely populated major city in the United States after New York City. San Francisco is the fourth-most populous city in California, after Los Angeles, San Diego, and San Jose, and the 13th-most populous city in the United Stateswith a census-estimated 2015 population of 864,816. The city and its surrounding areas are known as the San Francisco Bay Area, and are a part of the larger OMB-designated San Jose-San Francisco-Oakland combined statistical area, the fifth most populous in the nation with an estimated population of 8.7 million. - Frank Hyneman Knight (November 7, 1885 April 15, 1972) was an American economist who spent most of his career at the University of Chicago, where he became one of the founders of the Chicago school. Nobel laureates Milton Friedman, George Stigler and James M. Buchanan were all students of Knight at Chicago. Ronald Coase said that Knight, without teaching him, was a major influence on his thinking. F.A. Hayek considered Knight to be one of the major figures in preserving and promoting classical liberal thought in the twentieth century. - Herbert Clark Hoover (August 10, 1874 October 20, 1964) was an American politician who served as the 31st President of the United States from 1929 to 1933. A Republican, as Secretary of Commerce in the 1920s he introduced Progressive Era themes of efficiency in the business community and provided government support for standardization, efficiency and international trade. As president from 1929 to 1933, his ambitious programs were overwhelmed by the Great Depression, which seemed to get worse every year despite the increasingly large-scale interventions he made in the economy. He was defeated in a landslide in 1932 by Democrat Franklin D. Roosevelt, and spent the rest of his life as a conservative denouncing big government, liberalism and federal intervention in economic affairs, as Democrats repeatedly used his Depression record to attack conservatism and justify more regulation of the economy. - Alvin Rabushka ( born May 15 , 1940 ) is an American political scientist . He is a David and Joan Traitel Senior Fellow at the Hoover Institution at Stanford University , and member of the Mont Pelerin Society . He is best known for his work on taxation and transition economies . Together with Robert Hall , he wrote a detailed flat tax plan known as the Hall -- Rabushka flat tax . - A tax (from the Latin "taxo") is a financial charge or other levy imposed upon a taxpayer (an individual or legal entity) by a state or the functional equivalent of a state to fund various public expenditures. A failure to pay, or evasion of or resistance to taxation, is usually punishable by law. Taxes consist of direct or indirect taxes and may be paid in money or as its labour equivalent. Most countries have a tax system in place to pay for public/common/agreed national needs and government functions: some levy a flat percentage rate of taxation on personal annual income, some on a scale based on annual income amounts, and some countries impose almost no taxation at all, or a very low tax rate for a certain area of taxation. Some countries also charge a tax on corporate income, dividends, or distributionsthis is often referred to as double taxation as the individual shareholder(s) receiving this payment from the company will also be levied some tax on that personal income. - George Joseph Stigler (January 17, 1911 December 1, 1991) was a U.S. economist, the 1982 laureate in Nobel Memorial Prize in Economic Sciences and a key leader of the Chicago School of Economics. Stigler is famously known for crowning economics as "an imperial science". - A research university is a university that expects all its tenured and tenure-track faculty to continuously engage in research, as opposed to merely requiring it as a condition of an initial appointment or tenure. Such universities can be recognized by their strong focus on innovative research and the prestige of their brand names. On the one hand, research universities strive to recruit faculty who are the most brilliant minds in their disciplines in the world, and their students enjoy the opportunity to learn from such experts. On the other hand, new students are often disappointed to realize their undergraduate courses at research universities are overly academic and fail to provide vocational training with immediate "real world" applications; but many employers value degrees from research universities because they know that such coursework develops fundamental skills like critical thinking. What entity does 'alvin rabushka' has the relation 'occupation' with?
A:
economist