Question: 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.

Using a quote from the above article, answer the following question: Did Irving Fisher have any children?
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Problem: Bela Fleck and the Flecktones is an American band that combines jazz and bluegrass music. The band's name is a play on 1960s rock band Dick Dale and the Del-Tones. The Flecktones formed in 1988 when Bela Fleck was invited to perform on the PBS TV series The Lonesome Pine Specials. The original members were Fleck on banjo, Victor Wooten on bass guitar, his brother Roy Wooten on Drumitar, and Howard Levy on harmonica and keyboards.

In April 1997, the Flecktones became a quartet again, as they added saxophone player Jeff Coffin to the mix. Coffin would remain in the band from 1997 until 2008. In June 1997, the Flecktones opened for The Dave Matthews Band. In July the Flecktones toured Europe and sat in on the second set of a Phish show in Lyon, France. This marked the second and final time that the Flecktones played with Phish. In June 1998, the Flecktones released their sixth album, and fifth studio album, Left of Cool. Left of Cool represents a switch from previous Flecktones albums, as the band, according to critic Terri Horak "jettisoned their self-imposed rule to only record what could be duplicated on live instruments." In July 2000, the Flecktones released their eighth album, Outbound. Outbound is another studio album, and again the Flecktones' philosophy with this album was to do something different from everything they had done before. What makes Outbound unique is the way in which the Flecktones recorded the album. The quartet recorded each track on the album, then invited guest musicians to overdub vocals or instrumentation. Outbound guests include: Jon Anderson from Yes, Shawn Colvin and John Medeski, of Medeski, Martin and Wood, to name a few. The album earned the Flecktones the Grammy for Best Contemporary Jazz Album that year. Live at the Quick, which was also released as a DVD, is the band's ninth album, and second live album. For fans of live Flecktones, this album, like Live Art, successfully captured the sound and feel of the Flecktones in concert. Little Worlds, the band's tenth album was released on August 12, 2003. Like previous Flecktones' albums, Little Worlds features a slew of musical guests, from Sam Bush on mandolin, Derek Trucks on guitar and even former New York Yankee and guitarist Bernie Williams works his way into a track. Little Worlds was released as a 3-CD album, but for the less committed listener, the band also released Ten From Little Worlds, which includes ten songs off of the original 3-CD Little Worlds. In February 2006, the band released their eleventh album, The Hidden Land. As with every Flecktones album, they needed to change something from their last album. For The Hidden Land, the Flecktones didn't want any guest musicians. "'The truth is, the last few records are not what we are,' Fleck said. 'Obviously, we loved playing with those musicians, but if you keep on doing it, you become a gathering point rather than a group with its own identity.'" For the Flecktones to keep moving forward, they felt their music had to get back to the roots of the quartet. After spending much of the year apart, the Flecktones came together in 2008 to release a holiday album, Jingle All the Way.

Did the band go on any tours?

Answer with quotes:
After spending much of the year apart, the Flecktones came together in 2008 to release a holiday album, Jingle All the Way.