Answer the question at the end by quoting:

Jean Paul Getty (; December 15, 1892 - June 6, 1976) was an American-British industrialist. He founded the Getty Oil Company, and in 1957 Fortune magazine named him the richest living American, while the 1966 Guinness Book of Records named him as the world's richest private citizen, worth an estimated $1.2 billion (approximately $9.05 billion in 2017). At his death, he was worth more than $6 billion (approximately $25.80 billion in 2017).
On July 10, 1973, in Rome, 'Ndrangheta kidnappers abducted Getty's 16-year-old grandson, John Paul Getty III, and demanded by telephone a $17 million payment (approximately $93.7 million in 2017) for the young man's safe return. However, "the family suspected a ploy by the rebellious teenager to extract money from his miserly grandfather." John Paul Getty Jr. asked his father for the money, but was refused.  In November 1973, an envelope containing a lock of hair and a human ear arrived at a daily newspaper. The second demand had been delayed three weeks by an Italian postal strike. The demand threatened that Paul would be further mutilated unless the victims paid $3.2 million (approximately $17.6 million in 2017): "This is Paul's ear. If we don't get some money within 10 days, then the other ear will arrive. In other words, he will arrive in little bits."  When the kidnappers finally reduced their demands to $3 million (approximately $16.5 million in 2017), Getty senior agreed to pay no more than $2.2 million (approximately $12.1 million in 2017) - the maximum that would be tax-deductible. He lent his son the remaining $800,000 (approximately $4.4 million in 2017) at 4% interest. Paul III was found alive in a Lauria filling station, in the province of Potenza, shortly after the ransom was paid. After his release Paul III called his grandfather to thank him for paying the ransom but, it is claimed, Getty refused to come to the phone. Nine people associated with 'Ndrangheta were later arrested for the kidnapping, but only two were convicted. Paul III was permanently affected by the trauma and became a drug addict. After a stroke brought on by a cocktail of drugs and alcohol in 1981, Paul III was rendered speechless, nearly blind and partially paralyzed for the rest of his life. He died 30 years later on February 5, 2011, at the age of 54.  Getty defended his initial refusal to pay the ransom on two points. First, he argued that to submit to the kidnappers' demands would immediately place his other fourteen grandchildren at the risk of copy-cat kidnappers. He added:  The second reason for my refusal was much broader-based. I contend that acceding to the demands of criminals and terrorists merely guarantees the continuing increase and spread of lawlessness, violence and such outrages as terror-bombings, "skyjackings" and the slaughter of hostages that plague our present-day world. (Getty, 1976, p. 139).

What happened after the money was paid?

Paul III was found alive in a Lauria filling station,



Answer the question at the end by quoting:

Irving Fisher (February 27, 1867 - April 29, 1947) was an American economist, statistician, inventor, and Progressive social campaigner. He was one of the earliest American neoclassical economists, though his later work on debt deflation has been embraced by the Post-Keynesian school. Joseph Schumpeter described him as "the greatest economist the United States has ever produced", an assessment later repeated by James Tobin and Milton Friedman. Fisher made important contributions to utility theory and general equilibrium.
Fisher was born in Saugerties, New York. His father was a teacher and a Congregational minister, who raised his son to believe he must be a useful member of society. Despite being raised in religious family, he later on became an atheist. As a child, he had remarkable mathematical ability and a flair for invention. A week after he was admitted to Yale College his father died, at age 53. Irving then supported his mother, brother, and himself, mainly by tutoring. He graduated first in his class with a B.A degree in 1888, having also been elected as a member of the Skull and Bones society.  In 1891, Fisher received the first Ph.D. in economics granted by Yale. His faculty advisors were the theoretical physicist Willard Gibbs and the sociologist William Graham Sumner. As a student, Fisher had shown particular talent and inclination for mathematics, but he found that economics offered greater scope for his ambition and social concerns. His thesis, published by Yale in 1892 as Mathematical Investigations in the Theory of Value and Prices, was a rigorous development of the theory of general equilibrium. When he began writing the thesis, Fisher had not been aware that Leon Walras and his continental European disciples had already covered similar ground. Nonetheless, Fisher's work was a very significant contribution and was immediately recognized and praised as first-rate by such European masters as Francis Edgeworth.  After graduating from Yale, Fisher studied in Berlin and Paris. From 1890 onward, he remained at Yale, first as a tutor, then after 1898 as a professor of political economy, and after 1935 as professor emeritus. He edited the Yale Review from 1896 to 1910 and was active in many learned societies, institutes, and welfare organizations. He was president of the American Economic Association in 1918. The American Mathematical Society selected him as its Gibbs Lecturer for 1929. A leading early proponent of econometrics, in 1930 he founded, with Ragnar Frisch and Charles F. Roos the Econometric Society, of which he was the first president.  Fisher was a prolific writer, producing journalism as well as technical books and articles, and addressing various social issues surrounding of the First World War, the prosperous 1920s and the depressed 1930s. He made several practical inventions, the most notable of which was an "index visible filing system" which he patented in 1913 and sold to Kardex Rand (later Remington Rand) in 1925. This, and his subsequent stock investments, made him a wealthy man until his personal finances were badly hit by the Crash of 1929.  Fisher was also an active social and health campaigner, as well as an advocate of vegetarianism, Prohibition, and eugenics. He died in New York City in 1947, at the age of 80.

What kind of work did he do?
From 1890 onward, he remained at Yale, first as a tutor, then after 1898 as a professor of political economy, and after 1935 as professor emeritus.