It’s common practice today for entrepreneurs, especially those in Silicon Valley, to start a business, reach a certain level of success and then sell their project to the highest bidder. But Princeton University professor and entrepreneur Derek Lidow believes the trend isn’t always helpful to the broader economy. His book, Building on Bedrock , looks to the entrepreneurs of the past for examples of how to build lasting success. He visited the Knowledge at Wharton show, which airs on SiriusXM channel 111 , to explain why a slow burn can be better than a quick spark. An edited transcript of the conversation follows. Knowledge at Wharton: It does seem like everyone is trying to be an entrepreneur these days and it’s become a little bit like house-flipping. Why? Derek Lidow: That is a fantasy that many people have, but it does not describe how most of the wealth created by startups actually happens in our country.…