One practical economic problem is that perception can sometimes dictate reality. Even if the economy is moving along well, if consumers get spooked -- whether for a legitimate reason or not -- it can take a step back. Of course, the reverse is also true: that's what causes bubbles. Irrational optimism about some asset, like houses, causes too much economic activity, which leads to a painful correction. Because perception matters, the media plays an important role. If it pushes the public in the wrong direction, then their sentiment about the economy could be skewed with a counterproductive result.
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