Definition: In this task, you are given a statement spoken by a politician in natural language. Your task is to generate the subject of the discussion for the given statement. The subject generated is not necessarily a part of the given input. Your answer should contain one or more words.
Input: Over the last 20 years, the world has changed. It used to be that one could make a career out of working for one company. Today, the average worker stays at his or her job for barely four years.

economy