Final answer:
An increase in income in the United States could potentially lead to a decrease in net exports due to higher import demand, but the relationship is not purely cause-and-effect and involves other factors such as exchange rates and economic conditions.
Step-by-step explanation:
The assertion that an increase in income in the United States leads to a decrease in our net exports is complex. While it's true that a higher price level in the U.S. relative to other countries can make U.S. goods relatively more expensive and therefore decrease exports and increase imports, this is not directly tied to a general increase in income. An increase in income could lead to increased import demand without necessarily affecting the price levels directly.
Instead, how changes in income affect net exports can be influenced by a variety of factors, including consumer preferences, exchange rates, and the economic conditions of trade partners. Therefore, while it's possible for an increase in income to contribute to a decrease in net exports due to higher import demand, it is not a simple cause-and-effect relationship as the statement suggests.