Between 1922 and 1929 the annual GNP of the USA increased by . The average income per head increased by 27%.

FEATURES OF THE BOOM [CI SUCCESS]
a.  Consumer boom – growth of personal possessions (c.f. Woolworths, hire purchase, ).
b.  Innovation in production methods – especially in the motor industry (by 1925 Ford were producing a car every 10 seconds); this pushed down prices and made goods more accessible for ordinary people (the ‘’ cost $850 in 1910, only $295 in 1920).
c.  Synthetics – the invention of (the first plastic), cellophane and nylon - and chemicals.
d.  Upsurge in car ownership – esp. the Ford Model T; had been produced by 1927, and the number of Americans owning cars rose from 8 to 23 million.
e.  /electrical goods – fridges, washing machines, dishwashers, vacuum cleaners, record players.
f.  Communications revolution – number of doubled/ number of radios increased from 60,000 to 10 million.
g.  Entertainment industry – Hollywood, Charlie Chaplin, the ‘’ and cinemas, jazz clubs and .
h.  Stock market – Wall Street boomed (a '' market) with many people buying shares to make a profit. Many new businesses were 'floated' on the stock market.
i.  Skyscrapers, highways and urban development.

WHY INDUSTRY BOOMED [PAT GOT CASH]
a. Population – growing rapidly increased demand for consumer goods.
b. Abundant – esp. coal, iron and oil – allowed cheap production
c. – protected American industry from competition
d. Government – the government relaxed regulations and reduced taxes (this is called ‘’)
e. Opportunities of New Technology – e.g. electrical goods, radio, film,
f.  Techniques of production – Ford’s Assembly line method, and Frederick Taylor’s
g.   – increased prosperity increased prosperity.
h.  Advertising – e.g. billboards, radio commercials
i.  Sales methods – e.g. commercial travellers, mail order, chain stores such as Woolworths
j.  Hire Purchase – allowed people to buy now, pay later.