In 1926, Firestone, an American rubber company, started the world's largest rubber plantation in Liberia. This industry created 25,000 jobs, and rubber quickly became the backbone of the Liberian economy; in the 1950s, rubber accounted for 40% of the national budget. During the 1930s, Liberia signed concession agreements with Dutch, Danish, German, and Polish investors in what has been described as an "open door" economic policy.
In 1926, Firestone, an American rubber company, started the world's largest rubber plantation in Liberia. This industry created 25000 jobs, and rubbe,r quickly became the backbone of the Liberian economy; in the 1950s, rubber accounted for 40% of the national budget. During the 1930s, Liberia signed concession agreements with Dutch, Danish, German, and Polish investors in what has been described as an "open door" economic policy.