Yesterday, the US Supreme Court affirmed Colorado’s right to require online merchants to collect sales tax from Colorado residents who buy from them. Until now, buying online from a merchant located in anther state has required the buyer to pay sales tax directly to the state, rather than requiring the merchant to collect tax, in behalf of the state. States prefer the latter because individual payments directly to the state are a “hit or miss” proposition. The state can more easily hold a merchant accountable than it can hold thousands of individuals accountable. If other states... [...]