Theodore Levitt argues that a strategy of product imitation can be as profitable as innovation. There are four types of imitation: counterfeiters illegally copy products, cloners emulate branding and packaging with minor changes, imitators make lower quality copies at cheaper prices, and adapters take the best qualities from competitors and adapt their own products. While imitation avoids innovation costs and allows understanding customer segments, it also rewards the original innovator and the imitator must keep costs low and quality high to avoid being overtaken.