Question: What decade did Catchings and Foster spread their theory?
About the article "Great Depression", section "Inequality".

Candidate passages:
Two economists of the 1920s, Waddill Catchings and William Trufant Foster, popularized a theory that influenced many policy makers, including Herbert Hoover, Henry A. Wallace, Paul Douglas, and Marriner Eccles.
It held the economy produced more than it consumed, because the consumers did not have enough income.
Thus the unequal distribution of wealth throughout the 1920s caused the Great Depression.
According to this view, the root cause of the Great Depression was a global over-investment in heavy industry capacity compared to wages and earnings from independent businesses, such as farms.
The solution was the government must pump money into consumers' pockets.
That is, it must redistribute purchasing power, maintain the industrial base, but re-inflate prices and wages to force as much of the inflationary increase in purchasing power into consumer spending.
The economy was overbuilt, and new factories were not needed.
Foster and Catchings recommended federal and state governments start large construction projects, a program followed by Hoover and Roosevelt.
He collaborated with his Harvard classmate Waddill Catchings in a series of economics books that were highly influential in the United States in the 1920s.
His influential books, written with Catchings, were "Money" (1923), "Profits" (1925), "Business Without a Buyer" (1927), "The Road to Plenty" (1928), and "Progress and Plenty" (1930).
With Catchings, he was one of the leading pre-Keynesian economists, in the underconsumptionist tradition, advocating similar issues to Keynes such as the paradox of thrift and economic interventionism.
The two are now rarely mentioned in contemporary economics texts, standing as they do in the shadow of Keynes's "The General Theory.
"Foster and Catchings rejected traditional laissez-faire economics and called for aggressive federal involvement to balance the economy lest destabilizing forces upset prosperity.
The main problem was underconsumption, which could be overcome by strategic government spending in public works.
The theory strongly influenced the anti-depression programs of Herbert Hoover, and Franklin D. Roosevelt, as well as Federal Reserve Board Chairman Marriner Eccles. 
Catchings played for Duncanville High School in Duncanville, Texas, where she was named a WBCA All-American.
She participated in the WBCA High School All-America Game where she scored twelve points.
She is also the first player in history to be officially credited with scoring a quintuple-double.
Catchings was an All-American with the Tennessee Lady Volunteers basketball for 1997–2001.
As a freshman on the undefeated 1997–98 National champions, she was part of the "Three Meeks" with Semeka Randall and Chamique Holdsclaw.
Catchings was drafted by the Indiana Fever in 2001.
Unable to play in the 2001 season due to an ACL injury sustained during her senior year at Tennessee, she had an outstanding year in 2002 and was named WNBA Rookie of the Year.
She has led Indiana Fever in points, rebounds, assists, steals and blocks in 6 of her 11 WNBA seasons.
Catchings played for the USA women's basketball team at the 2004 Summer Olympic Games in Athens, helping the team win the gold medal.
In 2005, she scored her 2,000th point in the WNBA.
With this she became the fastest player to score 2000 career points in the WNBA, reaching the milestone in only four seasons of play.
She is also the fastest to 1,000 rebounds, 400 assists, and 300 steals.
In 2005, Catchings was also named the WNBA Defensive Player of the Year.
Catchings then repeated as Defensive Player of the Year in 2006.
She was again named Defensive Player of the Year in 2009 and 2010.
Also during the 2009 season she led her Indiana Fever to their first ever Eastern Conference championship, however they fell short in their quest to win the WNBA title as they were defeated in five games by the Phoenix Mercury.
In 2006, she was voted into the 2006 WNBA All-Star Game, and was also the leading vote-getter, but had to sit out because of a foot injury.
At half-time she was announced as a member of the All-Decade Team along with 9 other players and former Comets coach Van Chancellor.
Five years later she was voted in by fans as one of the Top 15 players in the fifteen-year history of the WNBA.
In 2011, she was the Most Valuable Player in the WNBA.
The next year she became the MVP of the WNBA Championships, leading her team past the defending champion Minnesota Lynx in 4 games.
She became the 9th player to win an NCAA Championship, a Gold Medal in the Olympics, and a WNBA Championship.
The other players who did that are Sue Bird, Swin Cash, Cynthia Cooper-Dyke, Maya Moore, Ruth Riley, Sheryl Swoopes, Diana Taurasi and Kara Wolters.
Catchings is a 7-time WNBA All-Star, a 5-time All-WNBA selection and is famous for recording the first ever quintuple double (25 points, 18 rebounds, 11 assists, 10 steals and 10 blocks in 1997).
She serves as President of the WNBA Players Association as of the 2012 season. 
A superb phrase maker and popularizer, he had a major impact on Franklin D. Roosevelt.
For example, FDR's talk of a nation "one-third ill-fed, ill-clothed, ill-housed" used one of Catchings' expressions.
With Foster, he was one of the leading pre-Keynesian economists, in the underconsumptionist tradition, advocating similar issues to Keynes such as the paradox of thrift and economic interventionism.
The two are now rarely mentioned in contemporary economics texts, standing as they do in the shadow of Keynes's "The General Theory."