21. Who is known for the concept of “Black Swan events” in economics?
a) Nassim Nicholas Taleb
b) Robert Shiller
c) Eugene Fama
d) Robert Solow
22. Who is the author of the book “Freakonomics”?
a) Steven Levitt
b) Angus Deaton
c) Richard Thaler
d) Amartya Sen
23. Who is known for the theory of “optimal currency area” in economics?
a) Robert Mundell
b) Paul Krugman
c) Joseph Stiglitz
d) Esther Duflo
24. Who is known for the concept of “information asymmetry” in economics?
a) George Akerlof
b) Michael Spence
c) Joseph Stiglitz
d) Oliver Williamson
25. Who is known for the theory of “public choice” in economics?
a) James Buchanan
b) Ronald Coase
c) Elinor Ostrom
d) Robert Shiller