When arbitrage is easy in a market of would-be price discriminators, who is more likely to get priced out of the market: those with elastic deman or those with inelastic deman? If Congress passed a...

When arbitrage is easy in a market of would-be price discriminators, who is more likely to get priced out of the market: those with elastic deman or those with inelastic deman? If Congress passed a privacy law making it illegal for colleges to ask for parents’ tax returns, would that tend to help students from high-income families or students from low-income families?