In the 1920s Americans just got out of WWI and they won so there was a boost in the economy. Also, industrialization and electricity was spreading.
The most logical combination would be to decrease the production of balls, and increase the production of nets, in order to achieve a market equilibrium that allows both products to be sold. For this it would be necessary to allocate more money to the production of nets, and to diminsh the cost referred to balls, until arriving at half of expense for each one.
It is the Articles of Confederation
The trips of Marco Polo, also known as the book of wanders or the book of the million, is the title with which the travel book of the Venetian merchant Marco Polo, known in Italy as Il Milione (the million), is usually translated into Spanish.
Thee work is divided into four books. The first describes the lands of the Middle East and Central Asia that Marco Polo crossed on his trip to China. The second book talks about China and the court of Kublai Khan. The third describes several coastal regions of the east Japan, India, Sri Lanka and southeast Asia, as well as the east cost of Africa. The fourth book deals with the wars that the mongols held shortly before, and also describes some regions much further north, such as Russia.
