Positive feedback effects are one of the most important sources of growth for businesses in many industries from new ones like social networking to old ones like telephones. It turns out that, like leverage, what’s really good on the upside is also quite bad on the downside. Malls and newspapers are two interesting recent […]

Do people spend more if they have a credit card? The answer will depend on who you ask.
Credit card companies say YES! when they extol the benefits of taking cards to grumpy merchants. And credit card bashers say YES! too when they pile on reasons for why credit cards should be banned. […]