An intellectual property right $($IPR$)$ provides its holder a limited period of monopoly right in the market for the relevant product. IP laws protect the right holders from IP infringers. There are two kinds of damage measures provided by IP laws in IPR infringement trials: lost profit or unjust enrichment. Lost profit is the profit that the IP rights holder lost due to the presence of the infringer; and unjust enrichment is the amount of money that is earned by the infringer in the market. Compare, using words, math, or graphs, the relative size of the two damage measures. Which measure do you think is more appropriate? Which one is more feasible in practice?