An economist is a professional in the social science discipline of economics. The individual may also study, develop, and apply theories and concepts from economics and write about economic policy. Within this field there are many sub-fields, ranging from the broad philosophical theories to the focused study of minutiae within specific markets, macroeconomic analysis, microeconomic analysis or financial statement analysis, involving analytical methods and tools such as econometrics, statistics, economics computational models, financial economics, mathematical finance and mathematical economics.

The professionalization of economics, reflected in academia, has been described as "the main change in economics since around 1900." Economists debate the path they believe their profession should take. It is, primarily, a debate between a scholastic orientation, focused on mathematical techniques, and a public discourse orientation, which is more focused on communicating to lay people pertinent economic principles as they relate to public policy. Surveys among economists indicate a preference for a shift toward the latter. However, these preferences expressed in private often differ with what is actually acted out in the public eye.

Barack Hussein Obama II (ⁱ/bəˈrɑːk huːˈseɪn oʊˈbɑːmə/; born August 4, 1961) is the 44th and current President of the United States. He is the first African American to hold the office. In January 2005, Obama was sworn in as a U.S. Senator in the state of Illinois. He would hold this office until November 2008, when he resigned following his victory in the 2008 presidential election.

Born in Honolulu, Hawaii, Obama is a graduate of Columbia University and Harvard Law School, where he was the president of the Harvard Law Review. He was a community organizer in Chicago before earning his law degree. He worked as a civil rights attorney in Chicago and taught constitutional law at the University of Chicago Law School from 1992 to 2004. He served three terms representing the 13th District in the Illinois Senate from 1997 to 2004.

Following an unsuccessful bid against the Democratic incumbent for a seat in the United States House of Representatives in 2000, Obama ran for the United States Senate in 2004. Several events brought him to national attention during the campaign, including his victory in the March 2004 Illinois Democratic primary for the Senate election and his keynote address at the Democratic National Convention in July 2004. He won election to the U.S. Senate in Illinois in November 2004. His presidential campaign began in February 2007, and after a close campaign in the 2008 Democratic Party presidential primaries against Hillary Rodham Clinton, he won his party's nomination. In the 2008 presidential election, he defeated Republican nominee John McCain, and was inaugurated as president on January 20, 2009. Nine months later, Obama was named the 2009 Nobel Peace Prize laureate. In April 2011, he announced that he would be running for re-election in 2012.

Joseph Eugene Stiglitz, ForMemRS, FBA, (born February 9, 1943) is an American economist and a professor at Columbia University. He is a recipient of the Nobel Memorial Prize in Economic Sciences (2001) and the John Bates Clark Medal (1979). He is also the former Senior Vice President and Chief Economist of the World Bank. He is known for his critical view of the management of globalization, free-market economists (whom he calls "free market fundamentalists") and some international institutions like the International Monetary Fund and the World Bank.

In 2000, Stiglitz founded the Initiative for Policy Dialogue (IPD), a think tank on international development based at Columbia University. Since 2001, he has been a member of the Columbia faculty, and has been a University Professor since 2003. He also chairs the University of Manchester's Brooks World Poverty Institute and is a member of the Pontifical Academy of Social Sciences. Stiglitz is an honorary doctor of Durham Business School, an honorary doctor at the Charles University, an honorary professor at Tsinghua University School of Public Policy and Management and a member of the Executive and Supervisory Committee (ESC) of CERGE-EI in Prague. Stiglitz is one of the most frequently cited economists in the world.

Gary Stanley Becker (born December 2, 1930) is an American economist. He is a professor of economics and sociology at the University of Chicago and a professor at the Booth School of Business. He was awarded the Nobel Memorial Prize in Economic Sciences in 1992 and received the United States Presidential Medal of Freedom in 2007. He is currently a Rose-Marie and Jack R. Anderson senior fellow at Stanford University's Hoover Institution.

Becker was one of the first economists to branch into what were traditionally considered topics belonging to sociology, including racial discrimination, crime, family organization, and drug addiction (see Rational addiction). He is known for arguing that many different types of human behavior can be seen as rational and utility maximizing. His approach can include altruistic behavior by defining individuals' utility appropriately. He is also among the foremost exponents of the study of human capital. Becker is also credited with the "rotten kid theorem". He is married to Guity Nashat, a historian of the Middle East whose research interests overlap his own.

Hugh Hendry is a Scottish fund manager at Eclectica Asset Management. He has become prominent in the United Kingdom for his commentary on the financial crisis.

Born in 1969 in Glasgow, Scotland, Hendry graduated from Strathclyde University in 1990 with a BA in economics and finance. It has been reported that he was the first non-Oxbridge graduate to get a job at the prestigious Edinburgh investment management firm, Baillie Gifford. However, this is not true - the firm started to recruit from other universities in the late 1980s. A number of Baillie Gifford's current partners who joined the firm prior to Hugh are graduates of Edinburgh, Dundee and Bristol.

Hendry has been referred to as "the most high-profile Scot in the controversial (Hedge Fund) sector."

Hendry has recently gained notoriety for railing against government bailouts and moral hazard in interviews and round-robin discussions. On an episode of the BBC’s Newsnight program aired on May 26, 2010, Hendry was featured along with Gillian Tett of Financial Times and Jeffrey Sachs of Columbia University. Hendry responded to a question from host Jeremy Paxman about the current European economic situation and the possibility of a Greek sovereign debt default with the comment, "I would recommend you panic".