In 3–5 sentences, evaluate if the United States has been a leader in the global economy in recent decades.

The United States has maintained a strong position as a leader in the global economy over the past few decades. It has the largest GDP in the world and is home to many of the largest multinational corporations. The US dollar is also considered the world's primary reserve currency. Additionally, the US has played a significant role in shaping global trade agreements and policies. However, increasing competition from emerging economies like China has challenged the US's leadership position in certain sectors.