Frameworks help evaluate a company’s potential. Whether its stock is a good investment is another question. Good companies can make bad investments if the price paid is too high.Warren Buffett’s FrameworkAre you investing in a business or economic franchise? Of course, we want to invest in the latter, but how can we know which companies have the potential to become an economic franchise and deliver outsized returns? Warren Buffett’s 1991 shareholder letter lays out the characteristics of an e...